《伤寒论》吴茱萸汤证三条：一载于阳明篇，“食谷欲呕者，属阳明也，吴茱萸汤主之”（２４３条）；一见于少阴篇，“少阴病，吐利，手足逆冷，烦躁欲死者，吴茱萸汤主之”（３０９条）；一见于厥阴篇，“干呕吐涎沫，头痛者，吴茱萸汤主之”（３７８条）。后一条又见于《金匮》。吴茱萸为暖肝和胃降逆止呕要药，注家均以此为厥阴寒证主方。但《金匮》又治“呕而胸满者，吴茱萸汤主之”（《呕吐哕下利病脉证治第十七》）。病机同为中寒气逆，虽副证不必悉同，而主证都有呕吐，则又四者所共同也。
此外，桂枝汤治太阳中风，为祛风解肌之剂，自是外证得之，用以解肌和营卫。但《金匮》用于妊娠，则是内证得之，取其化气调阴阳。又如“病腹满，发热十日，脉浮而数，饮食如故，厚朴七物汤主之”（《腹满寒疝宿食病脉证治第十》）。取朴、枳、大黄攻下里实；桂、甘、姜、枣以解肌宣表，是合汗下两法而为一方矣。更有奇者，如“气分，心下坚，大如盘，边如旋杯，水饮所作，桂枝去芍药加麻辛附子汤主之”（《水气病脉证治第十四》）。纯用辛甘温热之剂，以通阳和表，散寒温里，而为软坚拔积化气消饮之用。此皆以有效之经方，而应无穷之病变，并能神而明之，加减变化，庶各臻其效耳。
３从临床中列举《伤寒》方能治杂病之病例李氏用《伤寒》方治杂病颇多，兹选数例如下：病例：余某某，女，２５岁。初诊，自诉：去年夏月田间紧张劳动后，秋初又感寒发热，周余热第三卷１９４退，忽右臂疼痛异常，逢手腕、肘、肩部关节为甚，渐至肩不能抬，手不能握，惟以布带套其肩上，以助手指吃喝洗漱诸动作而已。因病久医治无效，直到翌年新春来舍求诊。诊其脉浮，舌白，月经正常，余无所苦。因思《金匮》“若但臂不遂者，此为痹”。《内经》以“风寒湿三气杂至合而为痹”。并以行痹为风气胜，痛处游走无定；痛为寒气胜，疼痛突出；着痹为湿气胜，痛有定处，顽麻不仁，是此证为着痹而兼痛痹也。病因属风寒湿，病位偏于表之经络。此时治法，当以桂枝汤和营卫，调气血，通经络，祛风寒湿为宜。遂用桂枝汤原方加片子姜黄以横行手臂，桑枝通达经络，服３剂后，手臂部微有热意，并有痒感。再诊：前方加当归、丝瓜络，服药时合入清酒一小杯，以活其血而通透其络。又３剂，身发热，手臂痛处发大小水泡样疹多粒，有的带脓，但手臂运动已见灵活。三诊：蕴伏之邪，已从外透，病有出路，可无虑矣。方用当归、赤芍、丹参、丹皮、忍冬藤、蒲公英、连翘、丝瓜络、甘草、桑枝以解其蕴毒，并通达经络。又５剂热退，水泡疹结疤而痊愈。
病例：李某某，男，５５岁。患消渴，经医院检查血糖尿糖值高，服西药治疗，时而小愈，时而发剧。来诊时其脉洪数，舌苔干燥而黄，并有异味，口渴引饮不解，善食形消，小便多，大便结。
治法拟先清肺胃之燥热，而救欲竭之真阴。急用白虎汤加西洋参、竹叶、山药、花粉、芦根，５剂后，渴象减轻，脉数亦和。再用生料六味地黄汤合生脉散加黄芪、枸杞、桑螵蛸、炒菟丝子滋肾阴以固其下，益肺气而救其上。此方服２０余剂，病势减轻，经检查血、尿均已恢复正常。后仍用前方略为加减外，每日并用鲜山药斤许，佐膳常服，以巩固疗效，直到痊愈。
病例：吴某某，男，４５岁。于某年５月患黄疸，住院治疗月余，黄疸总不消退，家人深以为虑。厌食，得油腻为甚，泛恶欲呕，大便结，小溲短黄，目黄、身黄均显明，脉弦数，舌苔黄。此是湿热郁于中焦，致肝胆疏泄失职，胆汁溢于全身，因而发为黄疸。遂与大柴胡汤加炒竹茹、茵陈、栀炭、茯苓、陈皮以疏肝利胆和胃，清利湿热以退黄。１０剂后黄疸渐轻。以后或加金铃子、玄胡索以理气活血止痛，或加香橼皮、麦芽以舒肝消胀去积，并减去大黄。上方出入加减，又服药２０余剂，而病告愈。
病例：程某某，女，４２岁。素有漏下之疾，常服调养心脾药，甚适。某年秋，值月经来潮，因情志躁动，遂至血下如崩。邀诊：视其面色白光白，精神疲困，呼吸气短，心悸，筑筑然跳动不安，不能安寐，脉细无力，舌质淡白少华，虚象显然。与归脾汤加阿胶、血余炭以调养心脾兼固崩止血为治。服药３剂，再诊：并见手足厥冷，时出冷汗，血下减少，但未全止，并微感腹痛，喜温畏冷，脉舌同前。作脾气虚寒而不统摄血液治之，与理中汤（红参、焦术、炮姜炭、炙草）加茯神、乌贼骨、阿胶、炒白芍、龙骨、血余炭。又３剂，漏下已止，心悸大定。惟精神疲惫，饮食少进，仍与归脾法调养收功。
病例：周某某，男，３２岁。某年春由亲属孙某某偕同来诊。自诉：结婚六年，未得生育，赴医院检查精子，因不能排精作罢。望之形体似丰，惟证有腰酸背冷，阴头寒，阳痿而不能排精，但有时约月余又有遗精情况出现。自服市上壮阳健身成药及注射荷尔蒙针剂，而病证依然，未能改善。诊脉沉弱无力，舌质淡白，虽值壮年，仍作先天不足肾命阴阳两虚治之，与附子汤（淡附片、人参、炒白芍、焦术、茯苓）加淫羊霍、枸杞、龟胶、鹿角胶、淡苁蓉、炒杜仲、五味子、炒补骨脂、炒菟丝子、桑螵蛸等出入为方，每月约服１５～２０剂。服后数月，阳事渐壮，排精正常。至次年春，喜来告曰：其爱人已怀孕矣。
病例：李某某，女，４０岁。初诊，自诉：素有胃痛，月经不调，或一月两至，或数月不来，或来第三卷１９５时淋沥不断。今因胃痛发剧求诊。余询其症状，述中脘疼痛，并如热灼，嘈杂似饥，气逆横亘，时如上冲状，稍涉气恼，则发而更甚。微渴，稍食粘腻油晕食品，则腹部亦痛，大便时溏，不能多食。近月经来而淋沥未断，脉弦细，舌白尖微红。作肝气犯胃上热下寒证治之。治法拟酸苦泄热酸甘化阴以清理其上；辛甘化阳甘温益脾以温暖其下。方用乌梅丸合芍药甘草汤加减。处方：乌梅、川椒、炮姜、炒川连、当归、炒白芍、党参、炙草，或加川楝子、玄胡索以理气活血止痛，或加麦芽、佛手片以宽膨消胀去积。来诊数次，不离上方加减。服药月余后，胃痛已止，纳食增进，月事渐调，后用白芍异功散调理以善其后。
三、伤寒温病可合可分伤寒、温病的统一与分离问题，是近２０年中医学术界争论的焦点之一，无论其争论结果如何，仅就其实际意义而言，均对伤寒、温病学说的发展起到了积极推动作用。站在历史与临床实际角度考察，伤寒与温病是祖国医学有关外感热病的两个不同概念，但他们之间存在着密切的关系，在中医学术发展的不同历史时期，伤寒与温病的含义及其相互关系亦有所不同。晋唐之前，温病学说尚未形成独立体系，此时伤寒含义较广，是一切外感热病的总称，其中也包括了温病，如《素问·热论》说：“今夫热病者，皆伤寒之类也。”而外受寒邪，感而即发的病证，即狭义伤寒，仅是外感热病中一种病证。《伤寒论》所说的伤寒包括了中风、湿温、热病、温病在内的多种病证，即属于广义伤寒。从仲景撰写《伤寒论》序来看，伤寒还包括了疫病在内。晋代葛洪《肘后方》说：“伤寒、时行、温疫三名同一种耳，而源本小异。其冬日伤于寒，或疾行力作，汗出得风冷，至夏发，名为伤寒；其冬日不甚寒，多暖急及西风，使人骨节缓堕，受病至春发，名为时行；其年岁中有疫气兼夹鬼毒相注，名为温病，如此诊候并相似。”并谓“贵胜雅言，总名伤寒，世俗因号为时行。”是温病属于伤寒的范围，两者是隶属关系。随着时代的发展，由于历代医家的不断探求和研究，祖国医学对温病的认识日渐深刻。特别是明清时代，温病学家叶天士、吴鞠通、王孟英等人在继承前人学术成就基础上，结合自己的临床经验，系统阐述了温病的病因、病机、感染途径、侵犯部位、传变规律和治疗大法等，并确立了温病以卫气营血、三焦为核心的辨证论治体系，形成了与伤寒学派相辅相成的温病学派，从而使中医对外感热病的认识更臻全面和完善。
卫气营血、三焦辨证虽然有别于六经辨证而各自成为独立辨证纲领，但他们之间并不是割裂的孤立的，而是仍然有着密切的内在联系，存在着辩证的统一性。这种内在关系和统一性，表现在他们共同研究人体疾病的过程和治疗方法，是建立在实践的基础上的，都能达到辨识病证和治疗疾病的目的。他们辨识疾病的基本精神都是以八纲为依据的。如六经辨证中，以三阳为表、为热、为实、为阳；以三阴为里、为寒、为虚、为阴。卫气营血辨证中，一般以卫、气为表，为阳，营血属里、属阴；卫气多实，营血多虚（营分、血分病有实者，则每多阴液亏虚）。卫气营血虽然概括的是热化过程，但热病后期亦有伤阳的寒化过程，三焦辨证也是如此，脱离八纲无法说明疾病的性质。
其次，他们的统一关系还表现在六经、卫气营血、三焦等辨证体系的互相联系上。如六经辨证，虽然以六经辨证为主导，但仍然涉及到卫气营血和三焦的内容。以“寒饮”为例，《伤寒论》认为与太阴、少阳两经发生病变有关，若具体地划分部位，则有在上焦的小青龙汤证，在中第三卷１９６焦的苓桂术甘汤证，在下焦的真武汤证。以太阳病为例，则有病在卫表的桂枝、麻黄汤证，有病在气分的水蓄膀胱证，还有瘀热在里的热结血瘀证。再从阳明病的发展过程看，阳明热炽，本身就是气分病，如果到热甚扰动营血的阶段，则有气营两燔的营分见证，亦有斑疹发狂的血分见证。另在卫气营血的辨证纲领中，涉及六经的也不乏其例，如前人总结出风温由太阴而发，夏暑发自阳明等等。热病初期与太阳也有一定的联系，热毒进入气分无不与阳明、少阳有关，热病后期到伤津竭液的阶段，又无不伤及少阴、厥阴。卫气营血与三焦之间也是彼此参合、互相为用的，例如热病进入气分阶段，其所包括的范围很广，单言“气分”二字难以表明具体病变部位，若再以三焦来划分界限，则更为清楚。如气热在上焦者以清气热为主，有栀子豉汤之例；在中焦者以大清气热或苦寒攻下为主，有白虎、承气汤之例；在下焦者有水热互结之猪苓汤证等。再从三焦看，如上焦热病，范围亦广，既有邪热犯肺的桑菊饮、银翘散证，又有气热烦扰的栀子豉汤证，还有逆传心包内陷心营的清营、清宫汤证等。由此可见，六经、卫气营血、三焦是彼此联系，互相统一的几个辨证体系，所以临床上必须全面掌握，融会贯通，而不可偏执一隅。
我们提出伤寒、温病即六经、卫气营血、三焦辨证存在有辩证统一之关系，但并非说伤寒、温病就需要统一，因为伤寒、温病毕竟是两种不同的理论体系，是中医学术不断发展成熟的标志，在理论上似无强行揉合的必要。再则伤寒（狭义）与温病虽同属外感病，初起同有发热恶寒表证，然其病因性质截然不同，证候表现亦有差异，治疗方法判然有别，临床亦不可混淆。如病因方面，温病是感受风热病邪引起，伤寒是风寒病邪外袭所致。病机方面，伤寒初起寒邪留恋在表，然后化热入里，演变较慢，而温病初起属热邪为病，表证短暂，传变迅速。另因寒为阴邪，故易伤阳气；而温为阳邪，则易伤阴液。证候表现上，温病初起发热重而恶寒轻，且多伴有口渴，苔虽白而舌边尖红，脉浮带数；伤寒初起虽亦发热恶寒，但多热轻寒重，且常兼有身痛无汗，脉象浮紧，舌苔白而舌质正常。治疗上，伤寒初起宜辛温发表，温病初起宜辛凉解表。温病治法不仅初起与伤寒不同，邪热入里而用清心、凉营、养阴、熄风及辟秽解毒宣窍等大法，则更与伤寒治法大异。前面谈到温病学说的形成是中医学术发展的结果，其中原因，是由于历史条件的限制，伤寒学说与其他医学上的学说一样，在外感热病的理论范畴中并非完美无缺。例如伤寒的概念和范围不够明确，在《难经·五十八难》中所列举的“伤寒有五”，也不能概括所有的外感热病，而且如何严格划定“伤寒有五”，五种病证之区别也欠清楚。从所论述病证的性质来说，伤寒学说的病因属性，尽管可以理解为其所说的寒邪是泛指一切外感热病的致病因素，但《伤寒论》毕竟是“详于寒而略于温”，对于风邪、暑邪以及其他温热之邪的致病特点，对于这类外邪化热化火的病理变化，对于这些病理变化所产生证候的辨析，以及相应治疗方药的应用方面亦显得不够全面和完整。后世医家在伤寒学基础上进一步发展而产生的温病学说，则弥补了这方面的不足。正如清·吴瑭《温病条辨·凡例》所说：“是书虽为温病而设，实可羽翼伤寒也。”既能“羽翼伤寒”，那么作为有别于伤寒学的温病学说，就应当保持他独自存在的地位，并按照其自身所具有的特色而不断发展。其发展的最终结果，丝毫不会影响到《伤寒论》作为辨治外感热病和内伤杂病及其他疾病专书所具有的实用价值，相反还会促进伤寒学说理论与临床研究更加深入的发展。这是毋庸置疑的。
第三卷１９７临证特色
《伤寒论》中关于吴茱萸汤证的记载共有三条：第一条记载于阳明篇，“进食后想要呕吐的，属于阳明病，用吴茱萸汤主治”（第243条）；第二条见于少阴篇，“少阴病，呕吐腹泻，手脚冰凉，烦躁得快要死去的，用吴茱萸汤主治”（第309条）；第三条见于厥阴篇，“干呕，吐出清稀涎沫，头痛的，用吴茱萸汤主治”（第378条）。最后一条也见于《金匮要略》。吴茱萸是温暖肝脏、调和胃气、降逆止呕的重要药物，历代注家都将其作为厥阴寒证的主方。但是，《金匮要略》又用它来治疗“呕吐且胸膈满闷的，用吴茱萸汤主治”（出自《呕吐哕下利病脉证治第十七》）。这些病症的病机都是中焦受寒、寒气上逆，虽然次要症状不必完全相同，但主要症状都有呕吐，这是这四条共同之处。
此外，桂枝汤用于治疗太阳中风证，是一种祛风解肌的药剂，自然是针对外感表证，用来解除肌表之邪、调和营卫。但在《金匮要略》中用于妊娠病，则是针对内伤杂证，取其化生阳气、调节阴阳的作用。又如“患腹部胀满，发热十天，脉象浮而数，饮食正常，用厚朴七物汤主治”（出自《腹满寒疝宿食病脉证治第十》）。取厚朴、枳实、大黄攻下里实的积滞；取桂枝、甘草、生姜、大枣解除肌表之邪，这是将发汗和解表两法合为一方的例子。更有奇特的，如“气分病，心下坚硬，大如盘子，边缘像倒扣的杯子，由水饮引起，用桂枝去芍药加麻黄细辛附子汤主治”（出自《水气病脉证治第十四》）。纯用辛甘温热的药剂，以通阳和表、散寒温里，起到软坚散结、消除水饮的作用。这些都是利用有效的经方，来应对无穷变化的病变，并能灵活变通，加减化裁，从而达到最佳疗效。
3. 从临床中列举《伤寒论》方剂能治疗杂病的病例：李氏使用《伤寒论》方剂治疗杂病很多，这里选取几例如下：
病例一：余某某，女，25岁。初诊时自述：去年夏天在田间紧张劳动后，秋初又感受寒邪发热，一周余热退去后，突然右臂异常疼痛，手腕、肘部、肩部关节尤为严重，逐渐发展到肩膀不能抬起，手不能握拳，只能用布带套在肩上，辅助手指完成吃喝洗漱等动作。因为久治无效，直到第二年新春才来求诊。诊察其脉象浮，舌苔白，月经正常，没有其他不适。心想《金匮要略》说“如果只有手臂不能活动，这是痹证”。《内经》认为“风寒湿三气混杂侵袭结合而成痹证”。并以行痹为风气偏胜，痛处游走不定；痛痹为寒气偏胜，疼痛剧烈；着痹为湿气偏胜，痛处固定，麻木不仁。因此此证属于着痹兼有痛痹。病因属于风寒湿，病位偏向体表的经络。此时治法，应当用桂枝汤调和营卫，调理气血，疏通经络，祛除风寒湿为宜。于是用桂枝汤原方加片子姜黄以横行手臂经络，加桑枝通达经络，服用3剂后，手臂部位微有热意，并有痒感。再诊：前方加入当归、丝瓜络，服药时兑入一小杯清酒，以活血并通透经络。又服3剂，身体发热，手臂痛处长出许多大小水泡样的疹子，有的带有脓液，但手臂运动已见灵活。三诊：蕴伏的邪气已从外部透出，病有出路，无需担忧了。方用当归、赤芍、丹参、丹皮、忍冬藤、蒲公英、连翘、丝瓜络、甘草、桑枝以解除蕴毒，并通达经络。又服5剂热退，水泡疹结痂而痊愈。
病例二：李某某，男，55岁。患有消渴病，经医院检查血糖尿糖值高，服用西药治疗，时而稍好，时而发作剧烈。来诊时其脉象洪数，舌苔干燥而黄，并有异味，口渴想喝水但不能缓解，食欲旺盛但形体消瘦，小便多，大便干结。
治法打算先清除肺胃的燥热，以挽救即将枯竭的真阴。急用白虎汤加西洋参、竹叶、山药、花粉、芦根，服用5剂后，口渴现象减轻，脉数也变得缓和。再用生料六味地黄汤合生脉散加黄芪、枸杞、桑螵蛸、炒菟丝子滋补肾阴以固摄下部，补益肺气以救助上部。此方服用20多剂，病情减轻，经检查血、尿均已恢复正常。之后仍用前方略微加减，同时每天并用鲜山药约一斤，佐餐常服，以巩固疗效，直到痊愈。
病例三：吴某某，男，45岁。在某年5月患黄疸，住院治疗一个多月，黄疸始终不消退，家人非常忧虑。厌食，尤其厌恶油腻食物，泛恶欲呕，大便干结，小便短黄，目黄、身黄均明显，脉弦数，舌苔黄。这是湿热郁结于中焦，导致肝胆疏泄功能失职，胆汁溢于全身，因而发生黄疸。于是给予大柴胡汤加炒竹茹、茵陈、栀炭、茯苓、陈皮以疏肝利胆和胃，清利湿热以退黄。10剂后黄疸逐渐减轻。以后或加金铃子、玄胡索以理气活血止痛，或加香橼皮、麦芽以舒肝消胀去积，并减去大黄。上方出入加减，又服药20多剂，病告痊愈。
病例四：程某某，女，42岁。素有漏下（非经期阴道出血）的疾病，常服用调养心脾的药物，效果很好。某年秋季，正值月经来潮，因情绪躁动，导致出血如崩漏般大量。邀请诊治：观察其面色㿠白，精神疲困，呼吸气短，心悸，心跳不安，不能安睡，脉细无力，舌质淡白少华，虚象明显。给予归脾汤加阿胶、血余炭以调养心脾兼固崩止血为治。服药3剂，再诊：并见手脚冰凉，时常出冷汗，出血减少但未全止，并微感腹痛，喜温畏冷，脉舌同前。按脾气虚寒不能统摄血液治疗，给予理中汤（红参、焦术、炮姜炭、炙草）加茯神、乌贼骨、阿胶、炒白芍、龙骨、血余炭。又服3剂，漏下已止，心悸大大安定。只是精神疲惫，饮食少进，仍用归脾法调养收功。
病例五：周某某，男，32岁。某年春季由亲属孙某某陪同来诊。自述：结婚六年，未得生育，赴医院检查精子，因不能排精作罢。望之形体似乎丰满，但证候有腰酸背冷，阴头寒冷，阳痿而不能排精，但有时约一个月又有遗精情况出现。自服市面上壮阳健身成药及注射荷尔蒙针剂，而病证依然，未能改善。诊脉沉弱无力，舌质淡白，虽值壮年，仍作先天不足肾命阴阳两虚治疗，给予附子汤（淡附片、人参、炒白芍、焦术、茯苓）加淫羊藿、枸杞、龟胶、鹿角胶、淡苁蓉、炒杜仲、五味子、炒补骨脂、炒菟丝子、桑螵蛸等出入为方，每月约服15～20剂。服用数月后，阳事渐壮，排精正常。至次年春，高兴地来告知说：其爱人已怀孕矣。
病例六：李某某，女，40岁。初诊时自述：素有胃痛，月经不调，或一月两次，或数月不来，或来时淋沥不断。今因胃痛发作剧烈求诊。询问其症状，述中脘疼痛，并如热灼，嘈杂似饥，气逆横亘，时如上冲状，稍微涉及气恼，则发作更甚。微渴，稍吃粘腻油晕食品，则腹部亦痛，大便时溏，不能多食。近月经来而淋沥未断，脉弦细，舌白尖微红。作肝气犯胃上热下寒证治疗。治法拟酸苦泄热酸甘化阴以清理其上；辛甘化阳甘温益脾以温暖其下。方用乌梅丸合芍药甘草汤加减。处方：乌梅、川椒、炮姜、炒川连、当归、炒白芍、党参、炙草，或加川楝子、玄胡索以理气活血止痛，或加麦芽、佛手片以宽膨消胀去积。来诊数次，不离上方加减。服药月余后，胃痛已止，纳食增进，月事渐调，后用白芍异功散调理以善其后。
三、伤寒与温病可合可分：伤寒、温病的统一与分离问题，是近20年中医学术界争论的焦点之一，无论其争论结果如何，仅就其实际意义而言，均对伤寒、温病学说的发展起到了积极推动作用。站在历史与临床实际角度考察，伤寒与温病是祖国医学有关外感热病的两个不同概念，但他们之间存在着密切的关系，在中医学术发展的不同历史时期，伤寒与温病的含义及其相互关系亦有所不同。晋唐之前，温病学说尚未形成独立体系，此时伤寒含义较广，是一切外感热病的总称，其中也包括了温病，如《素问·热论》说：“现在的热病者，都属于伤寒之类。”而外受寒邪，感而即发的病证，即狭义伤寒，仅是外感热病中一种病证。《伤寒论》所说的伤寒包括了中风、湿温、热病、温病在内的多种病证，即属于广义伤寒。从仲景撰写《伤寒论》序来看，伤寒还包括了疫病在内。晋代葛洪《肘后方》说：“伤寒、时行、温疫三名同一种耳，而源本小异。其冬日伤于寒，或疾行力作，汗出得风冷，至夏发，名为伤寒；其冬日不甚寒，多暖急及西风，使人骨节缓堕，受病至春发，名为时行；其年岁中有疫气兼夹鬼毒相注，名为温病，如此诊候并相似。”并谓“贵胜雅言，总名伤寒，世俗因号为时行。”是温病属于伤寒的范围，两者是隶属关系。随着时代的发展，由于历代医家的不断探求和研究，祖国医学对温病的认识日渐深刻。特别是明清时代，温病学家叶天士、吴鞠通、王孟英等人在继承前人学术成就基础上，结合自己的临床经验，系统阐述了温病的病因、病机、感染途径、侵犯部位、传变规律和治疗大法等，并确立了温病以卫气营血、三焦为核心的辨证论治体系，形成了与伤寒学派相辅相成的温病学派，从而使中医对外感热病的认识更臻全面和完善。
卫气营血、三焦辨证虽然有别于六经辨证而各自成为独立辨证纲领，但他们之间并不是割裂的孤立的，而是仍然有着密切的内在联系，存在着辩证的统一性。这种内在关系和统一性，表现在他们共同研究人体疾病的过程和治疗方法，是建立在实践的基础上的，都能达到辨识病证和治疗疾病的目的。他们辨识疾病的基本精神都是以八纲为依据的。如六经辨证中，以三阳为表、为热、为实、为阳；以三阴为里、为寒、为虚、为阴。卫气营血辨证中，一般以卫、气为表，为阳，营血属里、属阴；卫气多实，营血多虚（营分、血分病有实者，则每多阴液亏虚）。卫气营血虽然概括的是热化过程，但热病后期亦有伤阳的寒化过程，三焦辨证也是如此，脱离八纲无法说明疾病的性质。
其次，他们的统一关系还表现在六经、卫气营血、三焦等辨证体系的互相联系上。如六经辨证，虽然以六经辨证为主导，但仍然涉及到卫气营血和三焦的内容。以“寒饮”为例，《伤寒论》认为与太阴、少阳两经发生病变有关，若具体地划分部位，则有在上焦的小青龙汤证，在中焦的苓桂术甘汤证，在下焦的真武汤证。以太阳病为例，则有病在卫表的桂枝、麻黄汤证，有病在气分的水蓄膀胱证，还有瘀热在里的热结血瘀证。再从阳明病的发展过程看，阳明热炽，本身就是气分病，如果到热甚扰动营血的阶段，则有气营两燔的营分见证，亦有斑疹发狂的血分见证。另在卫气营血的辨证纲领中，涉及六经的也不乏其例，如前人总结出风温由太阴而发，夏暑发自阳明等等。热病初期与太阳也有一定的联系，热毒进入气分无不与阳明、少阳有关，热病后期到伤津竭液的阶段，又无不伤及少阴、厥阴。卫气营血与三焦之间也是彼此参合、互相为用的，例如热病进入气分阶段，其所包括的范围很广，单言“气分”二字难以表明具体病变部位，若再以三焦来划分界限，则更为清楚。如气热在上焦者以清气热为主，有栀子豉汤之例；在中焦者以大清气热或苦寒攻下为主，有白虎、承气汤之例；在下焦者有水热互结之猪苓汤证等。再从三焦看，如上焦热病，范围亦广，既有邪热犯肺的桑菊饮、银翘散证，又有气热烦扰的栀子豉汤证，还有逆传心包内陷心营的清营、清宫汤证等。由此可见，六经、卫气营血、三焦是彼此联系，互相统一的几个辨证体系，所以临床上必须全面掌握，融会贯通，而不可偏执一隅。
我们提出伤寒、温病即六经、卫气营血、三焦辨证存在有辩证统一之关系，但并非说伤寒、温病就需要统一，因为伤寒、温病毕竟是两种不同的理论体系，是中医学术不断发展成熟的标志，在理论上似无强行揉合的必要。再则伤寒（狭义）与温病虽同属外感病，初起同有发热恶寒表证，然其病因性质截然不同，证候表现亦有差异，治疗方法判然有别，临床亦不可混淆。如病因方面，温病是感受风热病邪引起，伤寒是风寒病邪外袭所致。病机方面，伤寒初起寒邪留恋在表，然后化热入里，演变较慢，而温病初起属热邪为病，表证短暂，传变迅速。另因寒为阴邪，故易伤阳气；而温为阳邪，则易伤阴液。证候表现上，温病初起发热重而恶寒轻，且多伴有口渴，苔虽白而舌边尖红，脉浮带数；伤寒初起虽亦发热恶寒，但多热轻寒重，且常兼有身痛无汗，脉象浮紧，舌苔白而舌质正常。治疗上，伤寒初起宜辛温发表，温病初起宜辛凉解表。温病治法不仅初起与伤寒不同，邪热入里而用清心、凉营、养阴、熄风及辟秽解毒宣窍等大法，则更与伤寒治法大异。前面谈到温病学说的形成是中医学术发展的结果，其中原因，是由于历史条件的限制，伤寒学说与其他医学上的学说一样，在外感热病的理论范畴中并非完美无缺。例如伤寒的概念和范围不够明确，在《难经·五十八难》中所列举的“伤寒有五”，也不能概括所有的外感热病，而且如何严格划定“伤寒有五”，五种病证之区别也欠清楚。从所论述病证的性质来说，伤寒学说的病因属性，尽管可以理解为其所说的寒邪是泛指一切外感热病的致病因素，但《伤寒论》毕竟是“详于寒而略于温”，对于风邪、暑邪以及其他温热之邪的致病特点，对于这类外邪化热化火的病理变化，对于这些病理变化所产生证候的辨析，以及相应治疗方药的应用方面亦显得不够全面和完整。后世医家在伤寒学基础上进一步发展而产生的温病学说，则弥补了这方面的不足。正如清·吴瑭《温病条辨·凡例》所说：“是书虽为温病而设，实可羽翼伤寒也。”既能“羽翼伤寒”，那么作为有别于伤寒学的温病学说，就应当保持他独自存在的地位，并按照其自身所具有的特色而不断发展。其发展的最终结果，丝毫不会影响到《伤寒论》作为辨治外感热病和内伤杂病及其他疾病专书所具有的实用价值，相反还会促进伤寒学说理论与临床研究更加深入的发展。这是毋庸置疑的。
第三卷197 临证特色
There are three records of the Wuzhuyu Tang syndrome in *Shanghan Lun* (Treatise on Cold Damage): The first is recorded in the Yangming chapter: "Those who desire to vomit after eating belong to Yangming disease, and Wuzhuyu Tang (Evodia Decoction) is the primary treatment" (Article 243); the second appears in the Shaoyin chapter: "In Shaoyin disease, with vomiting and diarrhea, cold extremities, and irritability bordering on death, Wuzhuyu Tang (Evodia Decoction) is the primary treatment" (Article 309); the third appears in the Jueyin chapter: "With dry heaving, spitting of clear saliva and foam, and headache, Wuzhuyu Tang (Evodia Decoction) is the primary treatment" (Article 378). The last one also appears in *Jingui Yaolue* (Essential Prescriptions of the Golden Cabinet). Evodia fruit (Wuzhuyu) is a key herb for warming the Liver, harmonizing the Stomach, descending rebellious Qi, and stopping vomiting. Commentators all regard this as the main formula for Jueyin Cold Syndrome. However, *Jingui Yaolue* also uses it to treat "vomiting accompanied by chest fullness, where Wuzhuyu Tang (Evodia Decoction) is the primary treatment" (from Chapter 17, Pulse, Syndrome, and Treatment of Vomiting, Hiccups, Diarrhea, and Dysentery). The pathogenesis for these conditions is the same: Cold invading the Middle Jiao and rebellious Qi rising. Although secondary symptoms need not be identical, the main symptom of vomiting is common to all four cases.
Furthermore, Guizhi Tang (Cinnamon Twig Decoction) is used to treat Taiyang Wind Strike (Taiyang Fengzhong), acting as an agent to dispel wind and release the muscle layer; naturally, when obtained from external syndromes, it is used to release the muscle layer and harmonize Ying (Nutritive) and Wei (Defensive) Qi. But when used in *Jingui Yaolue* for pregnancy, it addresses internal syndromes, taking advantage of its ability to transform Qi and regulate Yin and Yang. For example, "Regarding abdominal fullness, fever for ten days, floating and rapid pulse, with normal diet, Houpo Qiwu Tang (Magnolia Bark Seven-Ingredient Decoction) is the primary treatment" (from Chapter 10, Pulse, Syndrome, and Treatment of Abdominal Fullness, Cold Cramps, and Retained Food). This takes Magnolia Bark (Houpo), Immature Bitter Orange (Zhishi), and Rhubarb (Dahuang) to purge interior excess; Cinnamon Twig (Guizhi), Licorice (Gancao), Ginger (Shengjiang), and Jujube (Dazao) to release the muscle layer and ventilate the exterior. This combines purgative and diaphoretic methods into one formula. Even more uniquely, "Regarding Qi-level disorders, hardness below the heart, large as a plate, edges like an inverted cup, caused by fluid retention, Guizhi Qu Shaoyao Jia Mahuang Xixin Fuzi Tang (Cinnamon Twig Decoction without Paeonia plus Ephedra, Asarum, and Aconite) is the primary treatment" (from Chapter 14, Pulse, Syndrome, and Treatment of Water-Qi Disorders). Purely using acrid-sweet-warm-hot agents to unblock Yang and harmonize the exterior, scatter Cold and warm the interior, thereby achieving the effect of softening hardness, eliminating accumulation, transforming Qi, and resolving fluid retention. These are all examples of using effective classical formulas to respond to infinite variations in pathology, demonstrating divine flexibility in modification and adaptation to achieve optimal efficacy.
3. Listing clinical cases from *Shanghan Lun* formulas treating miscellaneous diseases: Li Shi used *Shanghan Lun* formulas to treat many miscellaneous diseases; here are selected examples:
Case 1: Yu XX, Female, 25 years old. At initial consultation, she reported: After intense labor in the fields last summer, she caught cold and had fever in early autumn. After the residual heat subsided a week later, her right arm suddenly became abnormally painful, especially at the wrist, elbow, and shoulder joints. It gradually progressed to the point where she could not raise her shoulder or grip with her hand, relying only on a cloth strap around her shoulder to assist her fingers in eating, drinking, and washing. Due to ineffective medical treatment over a long period, she sought consultation only in the new spring of the following year. Her pulse was floating, tongue coating white, menstruation normal, with no other discomforts. Recalling *Jingui Yaolue*: "If only the arm is unable to move, this is Bi Syndrome." *Neijing* states: "Wind, Cold, and Dampness mixing and combining cause Bi Syndrome." Among them, Xing Bi (Wandering Bi) is characterized by excessive Wind, with pain moving unpredictably; Tong Bi (Painful Bi) by excessive Cold, with prominent pain; Zhuo Bi (Fixed Bi) by excessive Dampness, with fixed pain, numbness, and insensitivity. Thus, this case is Zhuo Bi combined with Tong Bi. The etiology belongs to Wind-Cold-Dampness, and the location favors the meridians at the exterior level. The treatment method should use Guizhi Tang (Cinnamon Twig Decoction) to harmonize Ying and Wei Qi, regulate Qi and Blood, unblock meridians, and dispel Wind-Cold-Dampness. Therefore, the original Guizhi Tang (Cinnamon Twig Decoction) was used with added Pianzi Jianghuang (Turmeric Tuber) to traverse the arm meridians, and Sangzhi (Mulberry Twig) to unblock meridians. After 3 doses, slight warmth and itching were felt in the arm. At re-consultation: Danggui (Angelica Sinensis) and Sigualuo (Luffa Fruit Fiber) were added to the previous prescription, along with a small cup of clear wine taken with the medicine to invigorate Blood and penetrate collaterals. After another 3 doses, the body developed fever, and multiple vesicular rashes appeared at the painful sites on the arm, some containing pus, but arm movement became flexible. At third consultation: The latent pathogens have been excreted externally; there is a pathway for the disease, so there is no need to worry. The formula used Danggui (Angelica Sinensis), Chishao (Red Peony Root), Danshen (Salvia Miltiorrhiza), Danpi (Moutan Cortex), Rendongteng (Honeysuckle Stem), Pugongying (Dandelion), Lianqiao (Forsythia), Sigualuo (Luffa Fruit Fiber), Gancao (Licorice), and Sangzhi (Mulberry Twig) to resolve accumulated toxicity and unblock meridians. After another 5 doses, fever subsided, the vesicular rashes scabbed over, and recovery occurred.
Case 2: Li XX, Male, 55 years old. Suffering from Xiaoke (Wasting-Thirst), hospital examinations showed high blood sugar and urine sugar levels. Western medicine treatment provided temporary relief followed by severe exacerbations. At consultation, his pulse was surging and rapid, tongue coating dry and yellow with a foul odor, thirst with drinking unsatisfied, good appetite but emaciation, polyuria, and constipation.
The treatment plan was to first clear Dryness-Heat from the Lung and Stomach, and rescue the nearly exhausted True Yin. Urgently, Baihu Tang (White Tiger Decoction) was used with added Xiyangshen (American Ginseng), Zhuye (Bamboo Leaf), Shanyao (Dioscorea Rhizome), Huafen (Trichosanthes Root), and Lugeng (Reed Rhizome). After 5 doses, thirst decreased, and the rapid pulse moderated. Then, Shengliao Liuwei Dihuang Wan (Raw Six-Ingredient Rehmannia Pill) combined with Shengmai San (Generate the Pulse Powder) was used with added Huangqi (Astragalus), Gouqi (Goji Berry), Sangpiaoxiao (Mantis Egg Case), and Chao Tusizi (Processed Dodder Seed) to nourish Kidney Yin to secure the lower burner, and benefit Lung Qi to rescue the upper burner. After taking this formula for over 20 doses, the condition improved, and blood and urine tests returned to normal. Subsequently, the previous formula was slightly modified, and approximately one jin (500g) of fresh Shanyao (Dioscorea Rhizome) was consumed daily as part of the diet to consolidate efficacy until complete recovery.
Case 3: Wu XX, Male, 45 years old. In May of a certain year, he contracted Jaundice (Huangdan). After more than a month of hospitalization, the jaundice did not subside, causing great concern to his family. He had anorexia, especially aversion to greasy food, nausea and retching, constipation, short and yellow urine, and obvious yellowing of the eyes and body. His pulse was wiry and rapid, and tongue coating yellow. This indicated Damp-Heat stagnating in the Middle Jiao, causing failure of the Liver and Gallbladder to disperse and descend, leading to bile overflowing throughout the body, thus causing Jaundice. Da Chaihu Tang (Major Bupleurum Decoction) was administered with added Chao Zhuru (Processed Bamboo Shavings), Yichen (Artemisia Capillaris), Zhitan (Charred Gardenia), Fuling (Poria), and Chenpi (Citrus Peel) to soothe the Liver, benefit the Gallbladder, harmonize the Stomach, clear and drain Damp-Heat to resolve jaundice. After 10 doses, jaundice gradually lightened. Later, Jinlingzi (Viburnum Seed) and Xuanshen (Corydalis Rhizome) were added to regulate Qi, invigorate Blood, and stop pain, or Xianyuanpi (Citron Peel) and Maiya (Barley Sprout) were added to soothe the Liver, reduce distension, and eliminate accumulation, while Dahuang (Rhubarb) was removed. With modifications to the above formula, after another 20+ doses, the illness was cured.
Case 4: Cheng XX, Female, 42 years old. She had a chronic history of Louxia (non-menstrual vaginal bleeding) and often took herbs to nourish the Heart and Spleen, which suited her well. In autumn of a certain year, during menstruation, due to emotional agitation, bleeding became profuse like a collapse. Upon consultation: Her complexion was pale, spirit fatigued, breathing short, palpitations with restless beating, inability to sleep peacefully, pulse fine and weak, tongue pale and lusterless, clearly showing deficiency signs. Guipi Tang (Restore the Spleen Decoction) was given with added Ejiao (Donkey-Hide Gelatin) and Xuyutàn (Burnt Hair Ash) to nourish the Heart and Spleen while securing collapse and stopping bleeding. After 3 doses, at re-consultation: Cold extremities and occasional cold sweat appeared, bleeding decreased but did not stop completely, mild abdominal pain was felt, preferring warmth and fearing cold. Pulse and tongue remained the same. Treated as Spleen Qi Deficiency and Cold failing to control Blood, Lizhong Tang (Regulate the Middle Decoction) [Hongshen (Red Ginseng), Jiaozhu (Charred Atractylodes), Paojiangtan (Charred Ginger), Zhi Cao (Prepared Licorice)] was used with added Fushen (Poria with Hostwood), Wumeigu (Cuttlefish Bone), Ejiao (Donkey-Hide Gelatin), Chao Baishao (Processed White Peony Root), Longgu (Dragon Bone), and Xuyutàn (Burnt Hair Ash). After another 3 doses, bleeding stopped, and palpitations greatly stabilized. Only mental fatigue and poor appetite remained, so the Guipi method was continued for recovery.
Case 5: Zhou XX, Male, 32 years old. In spring of a certain year, he came for consultation accompanied by relative Sun XX. He reported: Married for six years without conception. Hospital sperm examination was abandoned because he could not ejaculate. Visually, his physique seemed robust, but symptoms included sore back and coldness, cold glans penis, impotence with inability to ejaculate, though occasionally nocturnal emission occurred about once a month. Self-medication with commercial aphrodisiacs and hormone injections yielded no improvement. Pulse was deep, weak, and powerless; tongue was pale. Despite being in his prime, he was treated as congenital insufficiency with dual deficiency of Kidney Mingmen Yin and Yang. Fuzi Tang (Aconite Decoction) [Dan Fupian (Prepared Aconite Slice), Renshen (Ginseng), Chao Baishao (Processed White Peony Root), Jiaozhu (Charred Atractylodes), Fuling (Poria)] was used with added Yinyanghuo (Epimedium), Gouqi (Goji Berry), Guijiao (Turtle Shell Gelatin), Lu Jiaojiao (Deer Antler Gelatin), Dan Congrong (Cistanche), Chao Duzhong (Processed Eucommia), Wuweizi (Schisandra), Chao Buguzhi (Processed Psoralea), Chao Tusizi (Processed Dodder Seed), and Sangpiaoxiao (Mantis Egg Case), among others, as a variable formula, taken about 15–20 doses per month. After several months of intake, sexual potency gradually strengthened, and ejaculation normalized. By the following spring, he joyfully reported that his wife was pregnant.
Case 6: Li XX, Female, 40 years old. At initial consultation, she reported: Chronic stomach pain and irregular menstruation, sometimes twice a month, sometimes absent for months, or dripping continuously when present. Now seeking consultation due to severe stomach pain. Inquiry revealed epigastric pain feeling like burning, acid regurgitation resembling hunger, rebellious Qi obstructing horizontally, sometimes rushing upward, worsening with anger. Mild thirst, abdominal pain after eating sticky or greasy foods, loose stools, inability to eat much. Menstruation was ongoing with continuous spotting. Pulse was wiry and fine; tongue white with slightly red tip. Treated as Liver Qi invading the Stomach with Upper Heat and Lower Cold. The treatment method proposed Sour-Bitter to drain Heat and Sour-Sweet to generate Yin to clear the upper; Acrid-Sweet to generate Yang and Sweet-Warm to benefit the Spleen to warm the lower. The formula used Wu Mei Wan (Mume Pill) combined with Shaoyao Gancao Tang (Peony and Licorice Decoction) with modifications. Prescription: Wu Mei (Mume Fruit), Chuanjiao (Sichuan Pepper), Paojiang (Prepared Ginger), Chao Chuanlian (Processed Coptis), Danggui (Angelica Sinensis), Chao Baishao (Processed White Peony Root), Dangshen (Codonopsis), Zhi Cao (Prepared Licorice). Optionally add Chuanlianzi (Sichuan Loropetalum) and Xuanshen (Corydalis) to regulate Qi, invigorate Blood, and stop pain; or Maiya (Barley Sprout) and Foshoupian (Buddha's Hand Slice) to relieve distension and eliminate accumulation. Over several visits, the formula was modified slightly. After over a month of medication, stomach pain ceased, appetite increased, and menstruation gradually regulated. Finally, Baishao Yigong San (White Peony Yi Gong Powder) was used for regulation to conclude treatment.
III. Shanghan and Wenbing can be combined or separated: The issue of unity and separation between Shanghan (Cold Damage) and Wenbing (Warm Diseases) has been one of the focal points of debate in the TCM academic community over the past 20 years. Regardless of the outcome of the debate, practically speaking, it has played a positive role in promoting the development of both Shanghan and Wenbing theories. Examining from historical and clinical perspectives, Shanghan and Wenbing are two different concepts in Traditional Chinese Medicine regarding exogenous febrile diseases, yet they are closely related. During different historical periods of TCM development, the meanings of Shanghan and Wenbing and their interrelationships varied. Before the Jin and Tang dynasties, Wenbing theory had not formed an independent system. At that time, the meaning of Shanghan was broad, serving as a general term for all exogenous febrile diseases, including Wenbing. For instance, *Suwen·Relun* states: "All current febrile diseases belong to the category of Shanghan." The disease caused by external Cold pathogen manifesting immediately upon infection is narrow-sense Shanghan, merely one type among exogenous febrile diseases. The Shanghan mentioned in *Shanghan Lun* includes various syndromes such as Fengzhong (Wind Strike), Shiwen (Damp-Warmth), Rebing (Febrile Disease), and Wenbing, belonging to broad-sense Shanghan. From Zhang Zhongjing's preface to *Shanghan Lun*, Shanghan also includes epidemics. Ge Hong's *Zhouhou Beiji Fang* (Emergency Prescriptions Kept Up the Sleeve) in the Jin Dynasty stated: "Shanghan, Shixing (Seasonal Epidemic), and Wenyi (Warm Plague) are three names for essentially the same thing, with minor differences in origin. Those injured by Cold in winter, or exerting themselves quickly causing sweat exposed to wind-cold, manifesting in summer, are named Shanghan; those not severely cold in winter, affected by sudden warmth and west winds causing bone and joint laxity, manifesting in spring, are named Shixing; those years with epidemic qi mixed with ghost toxins infecting each other, are named Wenbing. Such diagnostic presentations are similar." And it said, "Noble elegant speech generally calls them Shanghan, while common people call them Shixing." Thus, Wenbing belonged to the scope of Shanghan, representing a subordinate relationship. With the development of times, due to continuous exploration and research by physicians of successive generations, understanding of Wenbing in TCM deepened. Especially in the Ming and Qing dynasties, Wenbing experts Ye Tianshi, Wu Jutong, and Wang Mengying, building on predecessors' achievements and combining clinical experience, systematically expounded on the etiology, pathogenesis, infection routes, invasion sites, progression patterns, and major treatment principles of Wenbing. They established a syndrome differentiation and treatment system centered on Wei-Qi-Ying-Xue (Defensive-Qi-Nutritive-Blood) and Sanjiao (Triple Burner), forming a Wenbing school complementary to the Shanghan school, making TCM's understanding of exogenous febrile diseases more comprehensive and perfect.
Although Wei-Qi-Ying-Xue and Sanjiao differentiation differ from Six-Meridian differentiation and form independent guidelines, they are not isolated or severed but maintain close internal connections and dialectical unity. This internal relationship and unity lie in their shared study of human disease processes and treatment methods, grounded in practice, aiming to identify syndromes and treat diseases. Their basic spirit in identifying diseases relies on Eight Principles (Ba Gang). For example, in Six-Meridian differentiation, Three Yang are Exterior, Heat, Excess, and Yang; Three Yin are Interior, Cold, Deficiency, and Yin. In Wei-Qi-Ying-Xue differentiation, generally Wei and Qi are Exterior and Yang, while Ying and Blood are Interior and Yin; Wei and Qi are mostly Excess, while Ying and Blood are mostly Deficiency (though Ying and Blood diseases can be Excess, they often involve Yin fluid deficiency). Although Wei-Qi-Ying-Xue summarizes the heat-transformation process, late-stage febrile diseases also involve Yang-damaging cold-transformation, as does Sanjiao differentiation. Without Eight Principles, disease nature cannot be explained.
Secondly, their unified relationship is reflected in the mutual connection of differentiation systems like Six Meridians, Wei-Qi-Ying-Xue, and Sanjiao. For instance, although Six-Meridian differentiation is dominant, it still involves content from Wei-Qi-Ying-Xue and Sanjiao. Taking "Cold Fluid Retention" as an example, *Shanghan Lun* associates it with pathological changes in Taiyin and Shaoyang meridians. Specifically dividing locations, there is Xiao Qinglong Tang (Minor Blue Dragon Decoction) syndrome in the Upper Jiao, Ling Gui Zhu Gan Tang (Poria, Cinnamon, Atractylodes, and Licorice Decoction) syndrome in the Middle Jiao, and Zhenwu Tang (True Warrior Decoction) syndrome in the Lower Jiao. Taking Taiyang disease as an example, there are Guizhi Tang (Cinnamon Twig Decoction) and Mahuang Tang (Ephedra Decoction) syndromes where disease is in the Wei-surface; water-stagnation in the Bladder syndrome in the Qi level; and heat-binding blood stasis syndrome in the interior. Looking at the development of Yangming disease, intense Yangming heat itself is a Qi-level disease. If it progresses to disturbing Ying and Blood, there are Ying-level manifestations of simultaneous burning of Qi and Ying, or Blood-level manifestations of macules/rashes and mania. Also, in the Wei-Qi-Ying-Xue guideline, references to Six Meridians are common, such as predecessors summarizing that Fengwen (Wind-Warmth) originates from Taiyin, and Xiashu (Summer-Heat) originates from Yangming. Early-stage febrile diseases also have connections with Taiyang; heat-toxin entering the Qi level relates to Yangming and Shaoyang; late-stage febrile diseases damaging fluids affect Shaoyin and Jueyin. Wei-Qi-Ying-Xue and Sanjiao also complement and utilize each other. For example, when febrile disease enters the Qi level, the scope is broad; simply saying "Qi level" fails to specify the lesion site. Dividing by Sanjiao makes it clearer. For Qi-Heat in the Upper Jiao, clearing Qi-Heat is primary, e.g., Zhizi Chi Tang (Gardenia and Fermented Soybean Decoction); in the Middle Jiao, clearing Qi-Heat or bitter-cold purgation is primary, e.g., Baihu Tang (White Tiger Decoction) and Chengqi Tang (Order the Qi Decoction); in the Lower Jiao, water-heat binding exists in Zhuling Tang (Polyporus Decoction). Conversely, looking at Sanjiao, Upper Jiao febrile diseases cover a wide range: pathogenic heat attacking the Lung presents as Sangju Yin (Mulberry Leaf and Chrysanthemum Drink) or Yinqiao San (Honeysuckle and Forsythia Powder); Qi-heat causing restlessness presents as Zhizi Chi Tang (Gardenia and Fermented Soybean Decoction); reverse transmission to Pericardium sinking into Ying presents as Qingying Tang (Clear the Ying Decoction) or Qinggong Tang (Clear the Palace Decoction). Thus, Six Meridians, Wei-Qi-Ying-Xue, and Sanjiao are interconnected and unified differentiation systems. Clinically, they must be comprehensively mastered and integrated, avoiding partial adherence.
We propose that Shanghan/Wenbing, i.e., Six Meridians/Wei-Qi-Ying-Xue/Sanjiao differentiation, have a dialectical unity, but this does not mean Shanghan and Wenbing must be unified. They are fundamentally different theoretical systems, marking the maturation of TCM academia, and forcing integration theoretically seems unnecessary. Moreover, although narrow-sense Shanghan and Wenbing both belong to exogenous diseases and initially share exterior syndromes of fever and aversion to cold, their etiological natures are截然 different, symptom manifestations vary, and treatment methods are distinct, so they should not be confused clinically. Regarding etiology, Wenbing is caused by Wind-Heat pathogenic factors, while Shanghan is caused by Wind-Cold pathogenic factors. Regarding pathogenesis, Shanghan initially retains Cold at the exterior, then transforms into Heat entering the interior, evolving slowly; Wenbing initially involves Heat pathology, with brief exterior syndromes and rapid progression. Since Cold is a Yin pathogen, it easily damages Yang Qi; whereas Warmth is a Yang pathogen, it easily damages Yin fluids. Symptomatically, Wenbing initially presents with heavy fever and light aversion to cold, often accompanied by thirst, white coating but red tongue edges/tips, and floating-rapid pulse; Shanghan initially presents with fever and aversion to cold, but usually light fever and heavy cold, often with body ache and no sweating, floating-tight pulse, white coating, and normal tongue quality. Therapeutically, early Shanghan requires Acrid-Warm releasing the exterior; early Wenbing requires Acrid-Cool releasing the exterior. Wenbing treatments differ not only initially but also significantly when Heat enters the interior, employing major principles like clearing the Heart, cooling Ying, nourishing Yin, extinguishing Wind, and detoxifying/resolving turbidity/opening orifices, which are vastly different from Shanghan treatments. As mentioned earlier, the formation of Wenbing theory is a result of TCM academic development. Due to historical limitations, Shanghan theory, like other medical theories, was not perfect within the scope of exogenous febrile disease theory. For example, the concept and scope of Shanghan were unclear. The "Five Types of Shanghan" listed in *Nanjing·Fifty-Eighth Difficulty* could not encompass all exogenous febrile diseases, and distinguishing strictly among the five types was ambiguous. Regarding the nature of discussed syndromes, although the etiological attribute of Shanghan theory can be understood as Cold referring generally to all exogenous febrile disease pathogens, *Shanghan Lun* is indeed "detailed on Cold but brief on Warmth." It lacks comprehensiveness regarding the pathogenic characteristics of Wind, Summer-Heat, and other Warm pathogens, the pathological changes of these pathogens transforming into Heat/Fire, the differentiation of resulting syndromes, and the application of corresponding therapeutic formulas. The Wenbing theory developed later by physicians on the basis of Shanghan theory compensated for these deficiencies. As Wu Tang said in the Preface of *Wenbing Tiaobian* (Systematic Differentiation of Warm Diseases): "Although this book is set for Warm Diseases, it actually serves as wings for Shanghan." Since it can "support Shanghan," the Wenbing theory, distinct from Shanghan studies, should maintain its independent status and continue developing according to its own characteristics. Its ultimate development will not affect the practical value of *Shanghan Lun* as a specialized book for differentiating and treating exogenous febrile diseases, internal miscellaneous diseases, and other illnesses; rather, it will promote deeper theoretical and clinical research of Shanghan theory. This is beyond doubt.
Volume 3 Page 197 Clinical Characteristics