见少阴篇
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太阳病二日，反躁，反熨其背，而大汗出，大热入胃，胃中水竭，躁烦，必发谵语，
十余日，振栗自下利者，此为欲解也。故其汗从腰以下不得汗，欲小便不得，反呕欲
失溲，足下恶风，大便□，小盒饭数而反不数，及多大便已，头卓然而痛，其人足心
必热，榖气下流故也。
【注】
太阳病中风、伤寒，二日不躁，今反躁者，是不得汗出而躁，大青龙汤证也。不以青
龙汤发汗，反以火劫熨背，逼汗大出，火邪入胃，胃热水竭，则烦躁谵语所必发也。
十有余日，邪正相持，持久必争，争必振栗作解，然解非汗出及下利，邪无从解也。
若自下利，此为欲从里解也；若自汗出，此为欲从表解也。今十余日不自下利，而有
欲小便不得，反呕欲失溲者，是里不解也；不自汗出，而下身无汗，足下恶风者，是
表不解也。里不解者，大便必□，小盒饭数而反不数，则知水留胃中，久必肠润，其
久积之大便自应多下而解也。及多大便已，虽小便不得，诸病不解，其头卓然而痛，
是里解表未悉解也。表未悉解者，是因火逼汗出，而从腰以下不得汗，乃上解而下未
解也。故有小便不得，诸在下之病。今虽里解，而其人头卓然而头者，是表之余邪上
逆也。足心必热者，里之余热下流也。谷气者，即胃气也，言胃中热气随大便而下流
也。此病皆由妄行火劫致变，难以拘定成规，当诊犯何逆，随证治之可也。
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服桂枝汤，大汗出，脉洪大者，与桂枝汤如前法。若形似疟，一日再发者，汗出必解
，宜桂枝二麻黄一汤。
【注】
服桂枝汤，大汗出，病不解，脉洪大，若烦渴者，则为表邪已入阳明，是白虎汤证也
。今脉虽洪大而不烦渴，则为表邪仍在太阳，当更与桂枝汤如前法也。服汤不解，若
形如疟，日再发者，虽属轻邪，然终是为风寒所持，非汗出必不得解，故宜桂枝二麻
黄一汤，小发荣卫之汗，其不用麻黄桂枝各半汤者，盖因大汗已出也。
【集注】
方有执曰：服桂枝汤，证转大汗出，脉转洪大者，乃风多寒少，风邪欲散而以微寒持
之，两者皆不得解，而寒热如疟也。桂枝二麻黄一汤者，重解风而轻于散寒也。
见于少阴篇。
太阳病发病两天，反而出现烦躁，错误地用火熨背部，导致大汗淋漓，大热之邪内传入胃，致使胃中津液枯竭，患者躁动烦乱，必定会出现胡言乱语的症状。
过了十多天，如果患者出现身体震颤、战栗并自行腹泻的，这是病情将要解除的表现。所以，如果汗出仅局限于腰部以下，想要小便却排不出，反而出现呕吐、想要失禁小便的情况，脚底怕冷，大便干结难解，小便频数但尿量并不多，以及大量排便之后，头部突然感到疼痛，而患者的脚心必然发热，这是因为水谷之气向下流注的缘故。
【注解】
太阳病中的中风证和伤寒证，在发病两天时本不应烦躁，现在反而烦躁，这是因为无汗而导致的烦躁，属于大青龙汤证。如果不使用大青龙汤来发汗，反而用火法劫迫出汗，逼迫汗液大量外出，火邪侵入胃中，导致胃热津枯，那么烦躁谵语的症状就必然会发作。
经过十几天，邪气与正气相互对峙，持久相争，争斗剧烈时会出现寒战栗动的现象以图解除病邪。然而，病邪的解除并非通过汗出或下利，邪气就没有出路。如果是自行腹泻，这是病邪打算从体内（里）解除；如果是自行汗出，这是病邪打算从体表（表）解除。如今十多天了没有自行腹泻，却有想小便却排不出的情况，反而呕吐、想要失禁小便，这说明里证未解；没有自行汗出，且下半身无汗、脚底怕冷的，说明表证未解。里证未解的话，大便必然干结，小便频数但尿量少，由此可知是水湿停留在胃中，时间久了必然滋润肠道，那些长期积滞的大便自然会大量排出而得以解除。等到大量排便结束后，虽然小便仍排不出，各种病症也未完全解除，但头部突然感到疼痛，这说明里证已解而表证尚未完全解除。表证未完全解除的原因，是因为火法逼迫汗出，导致腰部以下无法出汗，这是上部已解而下部未解。因此出现了小便排不出等下部病症。如今虽然里证已解，但患者头部突然疼痛，这是表证的残余邪气向上逆冲所致。脚心必然发热，是里证的残余热气向下流注。谷气，就是胃气，意思是胃中的热气随着大便向下流注。这些病症都是由错误地使用火法劫汗导致的变证，难以拘泥于固定的常规，应当诊察犯了哪种误治，根据具体证候进行治疗即可。
服用桂枝汤后，大汗淋漓，脉象洪大的，按照之前的方法继续给予桂枝汤。如果症状像疟疾一样，一天发作两次的，汗出后必定能解除，适宜使用桂枝二麻黄一汤。
【注解】
服用桂枝汤后，大汗出，病邪未解，脉象洪大，如果出现心烦口渴，则是表邪已经传入阳明经，属于白虎汤证。如今脉象虽然洪大但没有心烦口渴，说明表邪仍在太阳经，应当再次按照之前的方法给予桂枝汤。服药后病未解，如果症状像疟疾，一天发作两次，虽然属于轻浅的邪气，但最终仍被风寒所束缚，不是通过汗出就一定不能解除，所以适宜使用桂枝二麻黄一汤，轻微地发营卫之汗。之所以不使用桂枝麻黄各半汤，是因为已经大汗出过了。
【集注】
方有执说：服用桂枝汤后，症状转变为大汗出，脉象转变为洪大，这是因为风邪多而寒邪少，风邪欲散但被微寒所牵制，两者都未能解除，从而出现寒热交替如疟疾一样的症状。桂枝二麻黄一汤，是重在解风邪而轻于散寒。
See the Shaoyin Chapter.
In Taiyang disease (Taiyang syndrome), on the second day, restlessness appears contrary to expectation. If the back is erroneously treated with fire moxibustion/ironing, profuse sweating ensues. The intense heat enters the Stomach, depleting the fluids in the Stomach. This leads to agitation and vexation, and delirious speech will inevitably occur.
After more than ten days, if the patient experiences tremors, shivering, and spontaneous diarrhea, this indicates that the disease is about to resolve. Therefore, if sweating occurs only from the waist down, there is an inability to urinate, vomiting occurs, and there is a sensation of impending urinary incontinence, along with aversion to cold at the soles of the feet, constipation, frequent but scanty urination, and upon the passage of large amounts of stool, sudden headache occurs, while the soles of the feet become hot; this is due to the downward flow of Gu Qi (Grain Qi/Stomach Qi).
[Annotation]
In Wind-stroke or Cold damage syndromes of the Taiyang channel, restlessness should not appear on the second day. If it does appear, it is due to the absence of sweating, constituting the Da Qing Long Tang (Major Blue Green Dragon Decoction) pattern. Instead of using Da Qing Long Tang to induce sweating, fire therapy was used to force sweat out profusely. The fire pathogen enters the Stomach, causing Stomach heat and fluid depletion, which inevitably leads to irritability, vexation, and delirium.
After ten-plus days, the pathogenic factor and healthy Qi are in a stalemate. Prolonged contention leads to vigorous struggle, manifesting as chills and shivering as the body attempts to expel the pathogen. However, resolution does not occur unless through sweating or diarrhea, as these provide the exit for the pathogen. Spontaneous diarrhea indicates an attempt at resolution from the interior (Li); spontaneous sweating indicates an attempt at resolution from the exterior (Biao). Currently, after ten-plus days, there is no spontaneous diarrhea, yet there is an urge to urinate without success, accompanied by vomiting and a sensation of urinary incontinence; this indicates the interior is not resolved. There is no spontaneous sweating, and the lower body lacks sweat, with coldness at the soles of the feet; this indicates the exterior is not resolved. When the interior is unresolved, the stool becomes dry and hard. Frequent but scanty urination suggests water retention in the Stomach. Over time, this moisture lubricates the intestines, and the accumulated stool will naturally pass in large quantities, leading to resolution. After the passage of large amounts of stool, although urination remains difficult and other symptoms persist, the sudden onset of headache indicates that the interior has resolved but the exterior has not fully resolved. The reason the exterior is not fully resolved is that forced sweating from fire therapy prevented sweating below the waist, meaning the upper part resolved while the lower part did not. Thus, symptoms such as urinary difficulty arise in the lower part. Although the interior has now resolved, the sudden headache is due to residual exterior pathogens reversing upward. The heat in the soles of the feet is due to residual interior heat flowing downward. "Gu Qi" refers to Wei Qi (Stomach Qi), indicating that heat in the Stomach flows downward with the stool. These conditions resulted from the reckless use of fire therapy to force sweat, creating complex changes that cannot be rigidly confined to standard rules. One must diagnose the specific error committed and treat according to the presenting syndrome.
After taking Gui Zhi Tang (Cinnamon Twig Decoction), if profuse sweating occurs and the pulse becomes flooding and large, administer Gui Zhi Tang again according to the previous method. If the condition resembles malaria, occurring twice a day, sweating will lead to resolution; Gui Zhi Er Ma Huang Yi Tang (Two Parts Cinnamon Twig and One Part Ephedra Decoction) is appropriate.
[Annotation]
After taking Gui Zhi Tang, if profuse sweating occurs and the disease is not resolved, and the pulse is flooding and large, if accompanied by vexation and thirst, the exterior pathogen has entered the Yangming channel, constituting the Bai Hu Tang (White Tiger Decoction) pattern. However, if the pulse is flooding and large but without vexation and thirst, the exterior pathogen remains in the Taiyang channel, and Gui Zhi Tang should be administered again according to the previous method. If the disease persists after taking the decoction, resembling malaria with two episodes per day, although the pathogen is light, it is still constrained by wind-cold. Resolution requires sweating. Therefore, Gui Zhi Er Ma Huang Yi Tang is suitable to slightly induce sweating of the Ying and Wei levels. The reason Ge Ban Tang (Half-Each Decoction of Cinnamon Twig and Ephedra) is not used is because profuse sweating has already occurred.
[Collected Annotations]
Fang Youzhi states: After taking Gui Zhi Tang, if the condition turns into profuse sweating and the pulse becomes flooding and large, it indicates that wind pathogen is predominant over cold. The wind pathogen desires to dissipate but is held back by slight cold. Neither can resolve easily, resulting in alternating chills and fever resembling malaria. Gui Zhi Er Ma Huang Yi Tang emphasizes resolving wind while lightly dispersing cold.