（庚寅之岁时疫流行夏秋之交霍乱大作死亡甚多至秋分以后四境稍安而又起咳嗽发热之症夫
咳嗽发热其病在肺，肺主皮毛其邪甚浅似无丧生之理然往往由此而气喘痰鸣卒至不起）
门人问曰、伤寒温病之异，近贤叶氏唱之，薜氏和之，可了然于心目矣。风温为温病之一，前人谓必身
热咳嗽烦渴，则是风温无不烦，无不渴者，若劫液后变现之症，则神昏耳聋，鼻鼾发痉。然则未至神昏
发痉，断无遽尔危亡之理。而今岁时气流行，秋分以后，咸病咳热，或渴或不渴，其变险也，必气喘痰鸣，
痰浓而稠，多至盈碗，毙者甚多，论者皆目之为风温。夫风温之症，多起于冬季，今不在冬季，而发在秋
分以后，其始也、无风温必有之见症，其毙也、又不在发痉神昏，而在痰鸣气喘，薛氏风温条例中，未见
痰喘之例足以毙人之症。生窃有疑，敢以相质。曰、此燥症也。知其为燥症，而曰风温者，习俗也。当今之
世，病者既属聋盲，医者亦类多粗鄙，风温之说，时有见闻，秋燥之症，转难入耳，谁登喻氏之堂、入喻氏
之室者，必曰是燥症，非风温也耶。夫风为阳邪，盛则生火，火则生风，风火相煽，津液无不被劫，神明无
不扰乱，故多眠鼻鼾，发痉神昏，是风温变险必有之症。惟今岁风木在泉，而秋令久燥，燥金克盛木，盛
木生化，甚于寻常，故木生火而火气来复，其克金也，势若燎原，壮火食气，则肺之气伤，火烁阴津，则肺
之阴伤，能不喘乎。火炼津液，而成胶腻，是以痰多稠粘。火激其痰而上升，故喉间霍霍有声，痰之声，即
火之声也，火即无形之痰，痰即有形之火。曰、燥火为患，已知之矣。然所起之症，类吐黄痰，考黄痰为湿
痰岂其既燥而复湿乎。曰、金病克木而木生火，火即燥之复气也。土为金母，湿即燥之化气也，故鞠通
吴氏谓复气为火，化气为湿，复而且化，故痰兼湿黄，化少复多，故湿不能济其燥也。若风温则风火内
旋，此则燥热伤肺，故彼之变险，则发痉神昏，此之变险则痰鸣气喘。治而愈者，类进甘寒清气，润燥清
金，盖金受天气之燥而克盛木，复气伤肺，由内而起之枯燥，与清凉未寒，天气爽燥之燥，判若霄渊，有
脉可凭，有舌可验，有象可征，临症推求，深有望于明敏者。
（庚寅年，时行疫病流行。夏秋之交，霍乱大发作，死亡人数众多。到了秋分以后，四周才稍微安定，但又出现了咳嗽、发热的症状。咳嗽和发热，病位在肺。肺主皮毛，邪气很浅，似乎没有丧命的道理。然而往往由此导致气喘、痰鸣，最终不治身亡。）
门人问道：“伤寒与温病的区别，近代贤者叶天士倡导它，薛生白附和它，心里已经很清楚明白了。风温是温病的一种，前人认为必定身体发热、咳嗽、心烦口渴，那么风温就没有不心烦、不口渴的。如果是劫夺津液后显现的症状，就会出现神志昏迷、耳聋、打鼾、抽搐。既然这样，那么未到神志昏迷、抽搐的地步，断然不会有突然危亡的道理。而如今时行疫气流行，秋分以后，大家都患咳嗽发热，有的口渴，有的不口渴，其险恶的变化，一定是气喘、痰鸣，痰浓稠，多到盈满一碗，死的人很多，评论的人都把它称为风温。风温的病证，多起于冬季，如今不在冬季，而在秋分以后发作，起初没有风温必然具备的症状，致死也不是因为抽搐、神志昏迷，而是因为痰鸣气喘。薛氏的风温条例中，没有见到因痰喘致死的情况。我私下里有疑问，敢以此向您请教。”
回答说：“这是燥症（由燥邪引起的疾病）。知道它是燥症，却称之为风温，是习俗使然。当今之世，病人大多聋盲无知，医生也多粗鄙浅陋，风温的说法，时常能听到看到，秋燥的病证，反而难以入耳。谁能登上喻嘉言的门庭，进入他的堂室呢？如果说是燥症，不是风温，那一定是指这个意思。风是阳邪，旺盛则生火，火则生风，风火相互煽动，津液没有不被劫夺的，神明没有不受到扰乱的，所以多眠睡、打鼾、抽搐、神志昏迷，这是风温发生险恶变化必然出现的症状。只是今年风气在泉（五运六气术语，指司天之气对面的在泉之气），而秋季长久干燥，燥金克制盛旺的木气，盛旺的木气生化，比平常更甚，所以木生火，而火气来复（报复之气），它克制金的势头，像烈火燎原一样猛烈。壮火消耗元气，则肺的元气受伤；火灼烧阴津，则肺的阴液受伤，能不气喘吗？火炼津液，形成胶腻之物，所以痰多且粘稠。火激发痰液向上冲逆，所以喉间有霍霍的声音，痰的声音，就是火的声音；火就是无形的痰，痰就是有形的火。”
问道：“燥火为害，我已经知道了。但是所起的症状，类似吐出黄痰，考察黄痰属于湿痰，难道既干燥又变湿了吗？”
回答说：“金气克制木气，而木生火，火就是燥气的复气（报复之气）。土是金之母，湿就是燥气的化气（转化之气）。所以鞠通吴氏说复气为火，化气为湿。既有复气又有化气，所以痰兼有湿性和黄色；化气少而复气多，所以湿气不能滋润其燥性。如果是风温，则是风火在内旋转；这里是燥热损伤肺脏，所以它的险恶变化，是出现抽搐、神志昏迷；这里的险恶变化，是出现痰鸣、气喘。治疗痊愈的病例，大多是进用甘寒清气、润燥清金的方法。这是因为肺受到天气之燥的影响而克制盛旺的木气，复气损伤肺脏，是由内而起的枯燥，与清凉未寒、天气爽燥之燥，截然不同，如同天地之差。有脉象可以凭据，有舌苔可以验证，有征象可以考察，临症推求，深切希望遇到明敏之人。”
(In the Gengyin year, epidemic diseases were prevalent. During the transition from summer to autumn, cholera erupted severely, resulting in many deaths. After the Autumnal Equinox, the situation around the region slightly stabilized, but symptoms of cough and fever (cough and fever) emerged. Cough and fever indicate that the disease is located in the Lung. The Lung governs the skin and hair; since the pathogenic factor is very superficial, it seems unlikely to be fatal. However, it often leads to asthma (asthma/wheezing) and rhonchi (abnormal lung sounds), ultimately resulting in death.)
A disciple asked: "The distinction between Cold Damage (Shanghan) and Warm Diseases (Wenbing) was advocated by the recent sage Ye Tianshi and supported by Xue Shengbai, so the matter is clear in our minds. Wind-Warmth (Fengwen) is a type of Warm Disease. Predecessors stated that it must present with body heat, cough, mental restlessness, and thirst. Therefore, there is no case of Wind-Warmth without restlessness or thirst. If these are symptoms appearing after the depletion of body fluids, they would manifest as coma, deafness, snoring, and convulsions. In that case, as long as one has not reached the stage of coma or convulsions, there is absolutely no reason for sudden critical danger. Yet now, during the prevalence of seasonal epidemic qi, after the Autumnal Equinox, everyone suffers from cough and fever. Some have thirst, some do not. Their dangerous transformations invariably involve asthma and rhonchi. The sputum is thick and viscous, filling bowls, and many die. Commentators all label this as Wind-Warmth. Wind-Warmth usually originates in winter. Now, it does not occur in winter but develops after the Autumnal Equinox. Initially, it lacks the mandatory presenting symptoms of Wind-Warmth; its lethality is not due to convulsions or coma, but due to rhonchi and asthma. In Xue’s regulations on Wind-Warmth, there is no example of death caused by phlegm-asthma. I harbor private doubts and dare to question you."
The response was: "This is Dryness Syndrome (Zaozheng). To know it is Dryness Syndrome yet call it Wind-Warmth is merely custom. In today's world, patients are largely ignorant, and physicians are mostly crude and shallow. The theory of Wind-Warmth is frequently heard and seen, while the syndrome of Autumn Dryness is rarely acknowledged. Who can enter the hall and chamber of Yu Jiayan? If one says this is Dryness Syndrome, not Wind-Warmth, that is the point. Wind is a Yang pathogen; when excessive, it generates Fire. Fire generates Wind. Wind and Fire fan each other, depleting body fluids and disturbing the Spirit (Shen). Thus, somnolence, snoring, convulsions, and coma are inevitable symptoms of dangerous transformation in Wind-Warmth. However, this year, the Wood Qi is in the lower position (Zai Quan), and the autumn season is prolonged dryness. Dry Metal overcomes vigorous Wood. The generation and transformation of vigorous Wood exceed the norm. Thus, Wood generates Fire, and the Fire Qi retaliates. Its attack on Metal is fierce like a prairie fire. Vigorous Fire consumes Qi, injuring the Qi of the Lung; Fire scorches Yin fluids, injuring the Yin of the Lung. How can there be no asthma? Fire refines fluids into sticky substances, hence the abundant, viscous sputum. Fire agitates the sputum to rise, causing roaring sounds in the throat. The sound of sputum is the sound of Fire; Fire is formless sputum, and sputum is solidified Fire."
The disciple asked: "I understand the harm of Dryness-Fire. However, the symptoms resemble vomiting yellow sputum. Yellow sputum is typically associated with Damp-Phlegm. Can it be both dry and damp?"
The response continued: "Metal overcoming Wood causes Wood to generate Fire. Fire is the retaliatory Qi of Dryness. Earth is the mother of Metal; Dampness is the transformed Qi of Dryness. Therefore, Wu Jutong stated that retaliatory Qi is Fire, and transformed Qi is Dampness. With both retaliation and transformation, the sputum combines dampness and yellow color. Since transformed Qi is less than retaliatory Qi, the dampness cannot moisten the dryness. In Wind-Warmth, Wind and Fire rotate internally; here, Dryness-Heat injures the Lung. Thus, the dangerous transformation of Wind-Warmth manifests as convulsions and coma, whereas here it manifests as rhonchi and asthma. Cases cured typically used Sweet-Cold methods to clear Qi, moisten dryness, and purify Metal. This is because the Lung, affected by atmospheric dryness, overcomes vigorous Wood, and retaliatory Qi injures the Lung. This internal dryness is fundamentally different from the crisp, cool dryness of the weather. There are pulses to rely on, tongue signs to verify, and manifestations to observe. In clinical deduction, I deeply hope for perceptive practitioners."