太阳与少阳并病，头项强痛，或眩冒，时如结胸，心下痞硬者，当刺大椎第一间，肺俞，肝俞，慎不可
发汗，发汗则谵语脉弦。五六日谵语不止，当刺期门。太阳少阳并病，心下硬，颈项强而眩者，当刺大椎，
肺俞、肝俞，慎勿下之。太阳少阳并病，而反下之，成结胸，心下硬，下利不止，水浆不下，其人心烦。
按病在少阳，或入阳明之腑，或入太阴之脏。将入阳明，而经证未
罢，下早则为结胸。将入太阴，误下则为痞。与太阳之结胸、痞证，由来正同也。
按结胸证，以大陷胸汤主之。痞证，以半夏泻心汤主之。
太阴之为病，腹满而吐，食不下，自利益甚，时腹自痛，若下之，必胸下结硬。
按太阴以湿土主令，其经起足大指，循内踝入腹，上膈，挟咽喉，而连舌本。太阴为三阴之长，
太阳经病不解，营卫内郁，而阳明，而少阳，四日必传太阴之经。若脏阴素旺，则不拘何日，自经入脏。
入脏则必须温里，解表不能愈矣。仲景立太阴以及少阴之篇，皆入脏之里病，非四五六日之经病也。
按太阴病，表寒未解，仍以桂枝汤主之。表未解而里寒急，先以四逆汤主之，后以桂枝汤主之，表已解而
里有实寒，以四逆汤主之。里有寒而上有虚热，以黄连汤主之。表未解而里虚，以桂枝加芍药汤主之。表
未解而里实，以桂枝加大黄汤主之。表寒郁而内生湿热。以茵陈蒿汤主之。表湿郁而内生瘀热，以麻黄连翘
赤小豆汤主之。表里俱有瘀热，以栀子柏皮汤主之。
太阳病与少阳病同时发生，出现头项部僵硬疼痛，有时伴有头晕目眩，症状时而像结胸证那样（邪热与水饮互结于胸膈），胃脘部痞塞坚硬，应当针刺大椎穴的第一间隙、肺俞穴和肝俞穴，千万不可使用发汗法。如果误用发汗法，会导致胡言乱语且脉象弦紧。过了五六天，如果谵语不止，应当针刺期门穴。
太阳病与少阳病同时发生，胃脘部硬满，颈项强直且伴有眩晕，应当针刺大椎穴、肺俞穴和肝俞穴，千万不要使用攻下法。太阳病与少阳病同时发生，反而使用了攻下法，导致形成结胸证，表现为胃脘部硬满，腹泻不止，连水浆都无法喝下，病人心中烦闷不安。
按：病邪位于少阳，或者传入阳明腑，或者传入太阴脏。即将传入阳明，但经表之证尚未解除，过早攻下就会形成结胸证。即将传入太阴，误用攻下就会形成痞证。这与太阳病的结胸证、痞证，其成因本质上是相同的。
按：结胸证，以大陷胸汤为主治方剂。痞证，以半夏泻心汤为主治方剂。
太阴病的主要表现是：腹部胀满，呕吐，饮食难以下咽，自发性腹泻日益严重，时常腹部自行疼痛。如果误用攻下法，必然导致胸膈下部结聚硬满。
按：太阴脾属湿土，主司时令。其经脉起于足大趾，沿内踝上行进入腹部，穿过膈肌，夹持咽喉，连接舌根。太阴为三阴经之首，太阳经的病邪如果不解，营卫之气在体内郁滞，进而传至阳明、少阳，经过四天必定传入太阴经。如果患者脏腑的阴气素来旺盛，则不拘泥于几日，病邪会直接从经传入脏。病邪入脏后，必须采用温补里虚的方法，单纯解表无法治愈。张仲景设立太阴病及少阴病的篇章，论述的都是病邪入脏后的里证，而非仅仅指第四、五、六天的经证。
按：对于太阴病，如果表寒未解，仍以桂枝汤为主治方剂。如果表证未解而里寒急重，先用四逆汤主治，待里寒缓解后再用桂枝汤主治；如果表证已解而里有实寒，以四逆汤主治。如果里有寒而上焦有虚热，以黄连汤主治。如果表证未解而里气虚弱，以桂枝加芍药汤主治。如果表证未解而里有实邪，以桂枝加大黄汤主治。如果表寒郁闭而生内湿热，以茵陈蒿汤主治。如果表湿郁闭而生内瘀热，以麻黄连翘赤小豆汤主治。如果表里俱有瘀热，以栀子柏皮汤主治。
Taiyang (Greater Yang) and Shaoyang (Lesser Yang) diseases occur simultaneously, presenting with stiffness and pain in the head and neck, sometimes accompanied by dizziness or vertigo. The symptoms occasionally resemble Jie Xiong (Chest Binding Syndrome, where pathogenic heat and fluid retention bind in the chest and diaphragm), with a sensation of fullness and hardness in the epigastrium. In such cases, acupuncture should be applied to the first interspace of the Dazhui (GV14) acupoint, Feishu (BL13), and Ganshu (BL18). Sweating therapy must be strictly avoided; if sweating is induced erroneously, it will lead to delirium and a wiry pulse. If delirium persists for five to six days, Qimen (LR14) acupoint should be needled.
When Taiyang and Shaoyang diseases coexist, with epigastric hardness, stiff neck, and dizziness, Dazhui (GV14), Feishu (BL13), and Ganshu (BL18) should be needled. Purging therapy must not be used. If Taiyang and Shaoyang diseases are treated erroneously with purging, Jie Xiong (Chest Binding Syndrome) forms, characterized by epigastric hardness, incessant diarrhea, inability to take even fluids, and mental restlessness.
Commentary: When the pathogen resides in Shaoyang (Lesser Yang), it may enter the Fu organs of Yangming (Greater Yang) or the Zang organs of Taiyin (Greater Yin). If it is about to enter Yangming but the exterior syndrome has not yet resolved, premature purging results in Jie Xiong (Chest Binding Syndrome). If it is about to enter Taiyin, erroneous purging results in Pi (Stagnation Syndrome, characterized by epigastric fullness and obstruction without pain). This etiology is fundamentally the same as that of Jie Xiong and Pi syndromes in Taiyang disease.
Regarding Jie Xiong (Chest Binding Syndrome), Da Xian Xiong Tang (Major Downward Draining Decoction) is the primary formula. Regarding Pi (Stagnation Syndrome), Ban Xia Xie Xin Tang (Pinellia Decoction to Drain the Epigastrium) is the primary formula.
The defining characteristics of Taiyin (Greater Yin) disease include abdominal fullness, vomiting, inability to eat, worsening spontaneous diarrhea, and occasional spontaneous abdominal pain. If purging is applied erroneously, it will inevitably cause binding and hardness below the chest.
Commentary: Taiyin Spleen governs damp earth. Its meridian originates at the tip of the great toe, ascends along the medial malleolus into the abdomen, passes through the diaphragm, flanks the throat, and connects to the root of the tongue. Taiyin is the chief of the three Yin meridians. If Taiyang disease does not resolve, Ying (Nutritive Qi) and Wei (Defensive Qi) become internally stagnant, transmitting to Yangming and then Shaoyang; after four days, it must transmit to the Taiyin meridian. If the patient’s visceral Yin is naturally robust, transmission from the meridian to the Zang organ can occur regardless of the number of days. Once the pathogen enters the Zang organ, warming the interior is required; exterior-releasing methods alone cannot cure it. Zhang Zhongjing established chapters on Taiyin and Shaoyin diseases to discuss interior syndromes resulting from pathogen entry into the Zang organs, rather than merely referring to meridian syndromes occurring on the fourth, fifth, or sixth day.
Regarding Taiyin disease: If the exterior cold has not resolved, Gui Zhi Tang (Cinnamon Twig Decoction) is the primary formula. If the exterior is unresolved but interior cold is urgent, Si Ni Tang (Frigid Extremities Decoction) is administered first, followed by Gui Zhi Tang (Cinnamon Twig Decoction). If the exterior is resolved but there is excess cold in the interior, Si Ni Tang (Frigid Extremities Decoction) is used. If there is cold in the interior and deficient heat above, Huang Lian Tang (Coptis Decoction) is used. If the exterior is unresolved and the interior is deficient, Gui Zhi Jia Shao Yao Tang (Cinnamon Twig Decoction with Added Paeonia) is used. If the exterior is unresolved and the interior is excess, Gui Zhi Jia Da Huang Tang (Cinnamon Twig Decoction with Added Rheum) is used. If exterior cold stagnates generating internal damp-heat, Yin Chen Hao Tang (Artemisiae Scopariae Decoction) is used. If exterior dampness stagnates generating internal stasis-heat, Ma Huang Lian Qiao Chi Xiao Dou Tang (Ephedra, Forsythia, and Red Bean Decoction) is used. If both exterior and interior present stasis-heat, Zhi Zi Bai Pi Tang (Gardeniae Cortex Phellodendri Decoction) is used.