魏玉横治吴性全，忽患症如疠风，眉毛脱落，面额褪皮，皮去，肉色又如白癜风，耳前后，目上
下，多生小疖，乳旁及腿上亦有，颇多脓血。往时久病喘，予以养肝之剂愈之。自是，足趾缝及两旁
常作痒，出稠水。及面疡既发，足疾顿愈。有指为风者，有指为湿者，指为牛皮癣、大麻风者。幸渠
素不轻药，守至数月，不愈，
乃就诊。余曰∶前所指皆非也，此即往时喘之变症耳。良由肝火炽甚，火极似风，上淫于肺，盖火就
燥也。前在经络则为喘，今在皮毛则为疡。薛立斋谓之疠，疠疡类症，治之必五十剂乃瘳。与生地、
杞子、蒌仁、赤芍、甘草、麦冬、净银花，首乌之属，出入加减，果五十剂而愈。夫肝木为龙，龙之
变化莫测，其于病也亦然。明者遇内伤症，但求得其本，则其标可按藉而稽矣。此天地古今未泄之秘，
《内经》微露一言曰∶肝为万病之贼。六字而止，似圣人亦不欲竟其端矣。殆以生杀之柄，不可操之
人耳。余临症数十年，乃始获之，实千虑之一得也。世之君子，其毋忽诸。（雄按∶此玉横案，余谓
外感由肺而入，内伤从肝而起。魏氏长于内伤，此言先得我心。惟各门附案，悉用此法，岂生平得意
在此而欲独竖一帜耶。）
薛立斋治一男子患痈，未作脓， 痛烦躁，便闭脉实。用内疏黄连汤二剂，诸症悉退。以四物汤
加芩、连，四剂而消。
一男子疡症溃后，便涩脉浮，按之则涩。以八珍汤加红花、桃仁、陈皮、杏仁，治之而愈。
一弱人患疡，溃后便秘而脉涩，以四物汤加红花、桃仁、黄 ，治之而愈。
薛立斋治一男子，患疡，溃后便秘而脉浮，以四君子汤加陈皮、杏仁、当归，治之而愈。（雄按∶
此症宜养血。）
一老人患疡，溃后大便秘，小便赤涩。诊之，脉浮数而涩，以八珍汤加知、柏，治之而愈。后小
便复数而赤，大便秘，口干目花，以加减八味丸、滋肾丸治之而愈。此症乃阴血虚，阳火盛，故用前
药有效。若投苦寒之剂，必致有误矣。
一男子患疡，溃后便涩，肌肤作痒。谓气血虚不能荣于腠理，用补剂治之。不信，乃服风药，致
不救。大抵疮疡始作，便秘脉数而涩者，宜降火凉血为主；溃后便秘脉涩者，宜补血气为主。若投风
药，祸在反掌。
邝进士患痈将痊，大便秘结，服大黄等药，反废饮食。乃用补气血之剂，加桃仁、麻仁，未效。
更以猪胆
汁，深纳谷道，续以养气血而愈。《原病式》云∶诸涩枯涸，皆属于燥。燥者，火之病气，病后血衰，
故大便秘涩，宜以辛甘润之。如用苦寒，则胃气乏矣。凡老弱产后便难者，皆气血虚也，胆汁最效。
魏玉横诊治吴性全，突然患病症状如同疠风（麻风病），眉毛脱落，面颊和额头皮肤剥落，皮脱落后，肌肉颜色呈现类似白癜风的状态，耳朵前后、眼睛上下方多处生出小疖子，乳房旁边及腿部也有，且化脓流血较多。此前他长期患有气喘病，我给予养肝的方剂治愈了他。从此以后，他的脚趾缝及两侧经常发痒，流出粘稠液体。等到面部疮疡发作后，足部的疾病立刻痊愈了。有人将此症归因为风邪，有人归因为湿邪，还有人诊断为牛皮癣或大麻风。幸好他平时不轻易用药，坚持数月无效后，才来就诊。我说：“之前所说的诊断都不对，这其实是以前气喘病的变证罢了。”这主要是因为肝火极其旺盛，火势极盛时表现出类似风邪的症状，向上侵犯肺部，因为火性炎上且喜燥。以前病邪在经络中表现为气喘，现在病邪在皮毛则表现为疮疡。薛立斋称之为疠，治疗疠疡类病症，必须服用五十剂药才能痊愈。我给他开具生地、枸杞子、瓜蒌仁、赤芍、甘草、麦冬、金银花、何首乌等药物，根据病情出入加减，果然服用五十剂后痊愈。肝木对应龙，龙的变幻莫测，人体患病也是如此。高明的人遇到内伤病证，只要找到根本原因，那么表象就可以依据它来考察了。这是天地古今未曾泄露的秘密，《内经》隐约提到一句话：“肝为万病之贼”，只有六个字就停止了，似乎圣人也不愿彻底探究其根源。大概是因为生杀大权，不能交给普通人吧。我临诊数十年，才获得这一心得，实在是千虑之一得。世上的君子们，不要忽视这一点。（徐大椿按语：我认为此案的要点在于，外感病由肺而入，内伤病从肝而起。魏氏擅长治疗内伤病，此言深得我心。只是各门类附带的医案，如果都使用这种方法，难道是他平生得意之处在此，想要独树一帜吗？）
薛立斋诊治一名男子患痈疽，尚未化脓，疼痛烦躁，大便闭塞，脉象实有力。使用内疏黄连汤两剂，所有症状全部消退。再用四物汤加黄芩、黄连，四剂后消散。
又诊治一名男子，疮疡溃破后，小便涩滞，脉浮，重按则涩。用八珍汤加红花、桃仁、陈皮、杏仁治疗，痊愈。
又诊治一名体弱之人患疮疡，溃破后便秘且脉涩，用四物汤加红花、桃仁、黄柏治疗，痊愈。
薛立斋诊治一名男子，患疮疡，溃破后便秘且脉浮，用四君子汤加陈皮、杏仁、当归治疗，痊愈。（徐大椿按语：此症应当养血。）
又诊治一名老人患疮疡，溃破后大便秘结，小便赤涩。诊察发现，脉浮数而涩，用八珍汤加知母、黄柏治疗，痊愈。后来小便再次频数且色赤，大便秘结，口干眼花，用加减八味丸、滋肾丸治疗，痊愈。此症属于阴血虚，阳火盛，所以用前面的药物有效。如果投用苦寒的药物，必定会导致误治。
又诊治一名男子患疮疡，溃破后小便涩滞，肌肤发痒。认为这是气血虚弱不能滋养腠理，用补益剂治疗。患者不信，反而服用祛风药，导致死亡。大致来说，疮疡初起，便秘脉数而涩者，应以降火凉血为主；溃破后便秘脉涩者，应以补血气为主。如果投用祛风药，灾祸就在反掌之间。
邝进士患痈疽即将痊愈时，大便秘结，服用大黄等药物，反而导致废寝忘食（食欲丧失）。于是使用补气血的方剂，加入桃仁、火麻仁，未见效。改用猪胆汁，深入纳入肛门，随后继续调养气血而痊愈。《原病式》说：“各种涩滞枯涸，都属于燥证。”燥，是火的病气，病后血衰，所以大便秘涩，应当用辛甘滋润的方法治疗。如果使用苦寒药物，就会使胃气衰竭。凡是年老体弱、产后大便困难者，都是气血虚弱，猪胆汁效果最好。
Wei Yuheng treated Wu Xingquan, who suddenly developed symptoms resembling Leprosy (Lifeng), with eyebrows falling out and skin peeling from the cheeks and forehead. After the skin peeled off, the flesh color resembled Vitiligo (Bai Dian Feng). Numerous small boils appeared around the ears, above and below the eyes, as well as beside the breasts and on the legs, discharging much pus and blood. Previously, he had suffered from chronic asthma, which I cured using liver-nourishing formulas. Since then, his toe webs and sides often itched, exuding thick fluid. When the facial sores erupted, the foot ailment healed instantly. Some attributed this to Wind pathogen, others to Dampness, while some diagnosed it as Psoriasis or Leprosy. Fortunately, he rarely took medicine lightly; after persisting for several months without improvement, he sought my consultation. I said: "The previous diagnoses were all incorrect. This is actually a transformed manifestation of his prior asthma. It stems primarily from excessive Liver Fire. When fire reaches its extreme, it mimics Wind, invading the Lung upwards, as fire naturally tends towards dryness. Previously, when the pathogen was in the meridians, it manifested as asthma; now that it is in the skin and hair, it manifests as sores. Xue Lizhai termed this 'Li'. Treating Li-sore syndromes requires fifty doses to recover." I prescribed Rehmanniae Radix (Shengdi), Lycii Fructus (Qizi), Trichosanthis Semen (Louren), Paeoniae Radix Rubra (Chishao), Glycyrrhizae Radix et Rhizoma (Gancao), Ophiopogonis Radix (Maidong), Lonicerae Flos (Jinyinhua), and Polygoni Multiflori Radix (Shouwu), adjusting the formula as needed. Indeed, he recovered after fifty doses. The Liver Wood corresponds to the Dragon; just as the dragon's transformations are unpredictable, so too are diseases. A wise practitioner dealing with internal injury syndromes seeks the root cause; once found, the branch symptoms can be investigated accordingly. This is a secret unrevealed by heaven, earth, antiquity, or modernity. The *Neijing* vaguely mentions one sentence: "The Liver is the thief of ten thousand diseases." It stops at these six characters, as if the sage did not wish to exhaust the explanation. Perhaps because the power of life and death should not be wielded by ordinary people. I have practiced clinical medicine for decades before obtaining this insight, truly one gain from a thousand reflections. Gentlemen of the world, do not neglect this. (Xu Dachun's note: Regarding this case by Yuheng, I believe external contractions enter via the Lung, while internal injuries originate from the Liver. Mr. Wei excels in treating internal injuries, and this statement aligns with my own views. However, if all attached cases in various categories used this method, would it not imply that his life's greatest achievement lies here, aiming to establish a unique school?)
Xue Lizhai treated a man suffering from an abscess that had not yet suppurated. He experienced pain, restlessness, constipation, and a full pulse. Two doses of Neishu Huanglian Tang (Internal Purging Coptis Decoction) caused all symptoms to recede. Subsequently, Siwu Tang (Four Substance Decoction) added with Scutellariae Radix (Huangqin) and Coptidis Rhizoma (Huanglian) for four doses resolved the condition.
He treated another man whose ulcer had ulcerated, presenting with dysuria, a floating pulse, and a choppy pulse upon deep pressure. Treatment with Bazhen Tang (Eight Treasure Decoction) added with Carthami Flos (Honghua), Persicae Semen (Taoren), Citri Reticulatae Pericarpium (Chenpi), and Armeniacae Semen Amarum (Xingren) resulted in recovery.
He treated a frail man with an ulcer. After ulceration, he suffered constipation and a choppy pulse. Treatment with Siwu Tang (Four Substance Decoction) added with Carthami Flos (Honghua), Persicae Semen (Taoren), and Phellodendri Cortex (Huangbai) led to recovery.
Xue Lizhai treated a man with an ulcer. After ulceration, he presented with constipation and a floating pulse. Treatment with Sijunzi Tang (Four Gentlemen Decoction) added with Citri Reticulatae Pericarpium (Chenpi), Armeniacae Semen Amarum (Xingren), and Angelicae Sinensis Radix (Danggui) resulted in recovery. (Xu Dachun's note: This syndrome requires nourishing blood.)
He treated an elderly man with an ulcer. After ulceration, he suffered severe constipation and dark, scanty urine. Examination revealed a floating, rapid, and choppy pulse. Treatment with Bazhen Tang (Eight Treasure Decoction) added with Anemarrhenae Rhizoma (Zhimu) and Phellodendri Cortex (Huangbai) resulted in recovery. Later, his urine became frequent and dark again, accompanied by constipation, dry mouth, and blurred vision. Treatment with Jiajian Bawei Wan (Modified Eight-Ingredient Pill) and Zishen Wan (Kidney-Nourishing Pill) led to recovery. This syndrome involved deficiency of Yin-blood and excess of Yang-fire, hence the efficacy of the aforementioned medicines. If bitter-cold agents had been administered, it would certainly have caused harm.
He treated a man with an ulcer. After ulceration, he suffered dysuria and pruritus of the skin. He reasoned that Qi and Blood deficiency failed to nourish the Couli (interstices), and thus prescribed tonifying agents. The patient did not believe this and instead took Wind-dispelling drugs, leading to his death. Generally speaking, for newly onset sores with constipation, rapid pulse, and choppy pulse, the primary treatment should be descending fire and cooling blood. For post-ulceration cases with constipation and choppy pulse, the primary treatment should be replenishing Qi and Blood. Administering Wind-dispelling drugs brings disaster within the flip of a hand.
Ku Jinshi suffered from an abscess nearing cure but presented with severe constipation. After taking Rhubarb (Dahuang) and other purgatives, he lost his appetite. Consequently, Qi- and Blood-tonifying agents were used, added with Persicae Semen (Taoren) and Cannabis Fructus (Maren), but without effect. Pig bile juice was then inserted deeply into the rectum, followed by continued nourishment of Qi and Blood, resulting in recovery. The *Yuanbing Shi* states: "All conditions of obstruction, dryness, and depletion belong to Dryness." Dryness is the pathological qi of Fire. Post-illness blood decline causes constipation and difficulty in defecation; thus, acrid-sweet moistening methods should be employed. Using bitter-cold agents depletes Stomach Qi. In cases of difficult defecation due to old age, weakness, or postpartum status, the cause is always Qi and Blood deficiency; pig bile is most effective.