伤寒三日三阳尽，热微烦躁入阴传，其人能食而不呕，脉小尿清为不传。
【注】伤寒三日，三阳受邪为尽，三阴当受邪，其人身热虽微，而烦躁者，谓邪去阳
入阴不解也。若其人反能食而不呕，脉静小，小便清，谓邪未入于阴为不传，欲自愈也。
太阴阴邪沉迟脉，吐食腹满有时疼，手足自温利不渴，理中汤主悸加苓，腹满去术
加附子，吐多去术加姜生，虽吐下多还用术，渴欲得水倍术宁，欲作奔豚术易桂，干姜寒
倍参腹疼。
【注】太阴阴邪，谓邪从阴化之寒证也。脉沉迟，太阴阴邪脉也。吐食、腹满时痛，太
阴里寒证也。手足自温，邪入阴也。自利不渴，脏无热也，宜理中汤主之。若心下悸，加
茯苓。腹满，去术加附子。吐多，去术加生姜。虽吐若下利多，还用白术。若渴欲得饮
水，仍倍加术。若脐下欲作奔豚，去术易桂。中寒倍加干姜，腹痛倍加人参。详太阴篇。
阳邪嗌干腹满痛，误下时痛大实疼，大承桂枝加芍大，脉弱芍大当审行。
【注】阳邪，谓太阴邪从阳化之热证也。嗌干，谓咽干太阴热也。腹满痛，太阴有余
证也。误下，谓误下邪陷太阴当分轻重也。时痛，谓腹有时痛，有时不痛，宜桂枝加芍药
汤和之。大实痛，谓腹大满痛，无时不痛，宜桂枝加大黄汤下之。兼阳明胃实，以大承气
汤下之。若脉弱即当行大黄芍药，宜斟酌减之，以其人胃气弱易动也。详太阴篇。
伤寒病经过三天，三阳经的病邪已经传尽，如果热势轻微且出现烦躁，说明病邪传入阴经。此时若患者能够进食且不呕吐，脉象细小、小便清长，表明病邪未传入阴经。
【注】伤寒病经过三天，三阳经受邪的情况已经结束，接下来三阴经应当受邪。如果病人身体发热虽然轻微，但出现烦躁症状，这是指病邪离开阳经进入阴经而未能解除。如果病人反而能够进食且不呕吐，脉象平静细小，小便清亮，这是指病邪未进入阴经，属于病邪未传变，疾病将要自愈。
太阴经受阴寒之邪表现为沉迟脉，伴有呕吐食物、腹部胀满并偶尔疼痛，手足自然温暖，下利但不口渴，主方用理中汤；若伴有心悸则加茯苓；若腹部胀满则去掉白术加附子；若呕吐较多则去掉白术加生姜；虽然呕吐或下利较多仍使用白术；若口渴想喝水则加倍使用白术；若感觉脐下即将发作奔豚气则将白术改为桂枝；若中寒严重则干姜用量加倍，人参用量也加倍以治腹痛。详见太阴篇。
【注】太阴经受阴寒之邪，是指病邪从阴化生为寒证。脉象沉迟，是太阴经受阴寒之邪的脉象。呕吐食物、腹部胀满且时常疼痛，是太阴经里寒证的表现。手足自然温暖，说明病邪已进入阴经。自发性下利且不口渴，说明脏腑内部没有热邪，适宜用理中汤主治。如果心下部有悸动感，加入茯苓。如果腹部胀满，去掉白术加入附子。如果呕吐较多，去掉白术加入生姜。即使呕吐或下利次数多，仍然使用白术。如果口渴想要饮水，依然加倍增加白术的用量。如果感觉脐下即将发作奔豚气，去掉白术改用桂枝。中寒严重则加倍干姜，腹痛严重则加倍人参。详见太阴篇。
阳邪（热证）导致咽喉干燥、腹部胀满疼痛，若是误用攻下法导致病情变化，需区分时痛和大实痛。治疗大实痛可用桂枝加大黄汤，若脉象虚弱则需谨慎使用大黄和芍药。
【注】阳邪，是指太阴经受邪后从阳化生的热证。咽喉干燥，是指太阴经的热证表现。腹部胀满疼痛，是太阴经有余（实证）的表现。误下，是指错误地使用攻下法导致病邪陷入太阴经，此时应当分轻重缓急处理。时痛，是指腹部有时疼痛、有时不痛，适宜用桂枝加芍药汤调和。大实痛，是指腹部极度胀满疼痛，无时不痛，适宜用桂枝加大黄汤攻下。如果兼有阳明胃腑实证，则用大承气汤攻下。如果脉象虚弱，则应当谨慎使用大黄和芍药，宜斟酌减量，因为这类人胃气虚弱，容易因药物攻伐而动荡。详见太阴篇。
After three days of cold damage (Shanghan), the pathogenic factors in the three Yang meridians are exhausted. If the heat is slight and irritability occurs, it indicates transmission to the Yin meridians. However, if the patient can eat without vomiting, with a fine pulse and clear urine, it indicates that the pathogen has not transmitted to the Yin meridians.
[Note] After three days of cold damage, the involvement of the three Yang meridians is complete, and the three Yin meridians should next be involved. Although the body heat is slight, the presence of irritability indicates that the pathogen has left the Yang meridians and entered the Yin meridians without being resolved. Conversely, if the patient can eat without vomiting, with a calm and fine pulse and clear urination, it indicates that the pathogen has not entered the Yin meridians; this signifies no transmission, and the disease is likely to heal spontaneously.
The pulse for Taiyin syndrome caused by Yin-cold pathogens is deep and slow, accompanied by vomiting food, abdominal fullness, and occasional pain. The hands and feet remain naturally warm, and there is spontaneous diarrhea without thirst. The primary formula is Lizhong Tang (Replenish the Middle Decoction). If palpitations are present, add Fuling (Poria); if abdominal fullness occurs, remove Baizhu (Atractylodis Macrocephalae Rhizoma) and add Fuzi (Aconiti Lateralis Radix Praeparata); if vomiting is frequent, remove Baizhu and add Shengjiang (Zingiberis Rhizoma Recens); even with frequent vomiting or diarrhea, continue using Baizhu; if thirst with desire for water occurs, double the dosage of Baizhu; if there is a sensation of Qi rushing upward from below the umbilicus (Ben Tun / Running Piglet), replace Baizhu with Guizhi (Cinnamomi Ramulus); if middle-jiao cold is severe, double the dosage of Ganjiang (Zingiberis Rhizoma); for abdominal pain, double the dosage of Renshen (Ginseng Radix et Rhizoma). See the Taiyin chapter for details.
[Note] Taiyin Yin-cold refers to a cold syndrome generated when the pathogen transforms according to Yin characteristics. A deep and slow pulse is the pulse sign of Taiyin Yin-cold. Vomiting food, abdominal fullness, and intermittent pain are signs of interior cold in the Taiyin meridian. Naturally warm hands and feet indicate the pathogen has entered the Yin meridians. Spontaneous diarrhea without thirst indicates the absence of heat in the zang organs, making Lizhong Tang appropriate. For epigastric palpitations, add Fuling. For abdominal fullness, remove Baizhu and add Fuzi. For frequent vomiting, remove Baizhu and add Shengjiang. Even with frequent vomiting or diarrhea, Baizhu should still be used. For thirst and desire to drink, increase the dosage of Baizhu. For impending Ben Tun (Running Piglet) sensation below the umbilicus, remove Baizhu and substitute Guizhi. For severe middle-cold, double Ganjiang; for severe abdominal pain, double Renshen. See the Taiyin chapter for details.
Yang-pathogen (heat syndrome) causes dry throat and abdominal fullness with pain. If mistaken treatment with purgatives leads to complications, one must distinguish between intermittent pain and severe true excess pain. Severe true excess pain may be treated with Guizhi Jiadahuang Tang (Cinnamon Twig and Rhubarb Decoction); however, if the pulse is weak, Da Huang (Rhei Radix et Rhizoma) and Shaoyao (Paeoniae Radix Alba) should be used with caution.
[Note] Yang-pathogen refers to a heat syndrome where the Taiyin pathogen transforms according to Yang characteristics. Dry throat indicates heat in the Taiyin meridian. Abdominal fullness and pain indicate an excess condition in the Taiyin meridian. "Mistaken purgation" refers to the erroneous use of purgative methods causing the pathogen to sink into the Taiyin meridian, requiring assessment of severity. Intermittent pain (pain occurring at times but not others) should be harmonized with Guizhi Jiashao Yao Tang (Cinnamon Twig and Peony Decoction). Severe true excess pain (constant and severe abdominal fullness and pain) should be purged with Guizhi Jiadahuang Tang. If accompanied by Yangming stomach excess, Dachengqi Tang (Major Order the Qi Decoction) should be used for purgation. If the pulse is weak, Da Huang and Shaoyao should be used cautiously and dosages reduced, as such patients have weak Stomach Qi and are prone to disturbance from harsh medications. See the Taiyin chapter for details.