夫伤寒七日。病法当不愈。阴阳诸经传病终故也。今七日以后。病反甚者。欲为再经病
也。再经病者。是经络重受病也。
治伤寒七日不解。头痛。有热在里。大肠秘涩。与承气汤后。其小便清者。病不
在里。
桂枝（一两） 赤芍药（一两） 甘草（一两炙微赤锉） 麻黄（一两去根节） 芎
（一两）
柴胡（一两去苗） 浓朴（二两去粗皮涂生姜汁炙令香熟）
上件药。捣粗罗为散。每服四钱。以水一大盏。入生姜半分。枣三枚。煎至六分。去滓
。不计时候热服。衣覆取汗。如人行十里未汗。再服。
治伤寒七日。脉浮。发热无汗。渴欲饮水。无表证。宜服知母散方。
知母（一两） 石膏（二两） 甘草（半两炙微赤锉） 粳米（半两） 人参（半两去
芦头） 葛
根（半两锉）
上件药。都锉。以水三大盏半。煎至二盏。去滓。不计时候。分温五服。
治伤寒七日。发热。汗出不解。心中痞坚。宜服前胡汤方。
前胡〔二（三）两去芦头〕 赤茯苓（二两） 白术（二两） 川大黄（一两锉碎微炒）
赤芍
药（一
（二两去
粗皮涂
上件药。捣粗罗为散。每服五钱。以水一大盏。入生姜半分。枣三枚。煎至五分。去滓
。不计时候温服。
治伤寒七日。大下后。脉沉迟。手足厥逆。喉咽不利。胸膈烦躁。宜服麻黄散方。
麻黄（二两去根节） 当归（一两锉微炒） 川升麻（一两） 知母（一两） 赤芍药
（一两）
天门
两） 白术
（一
上件药。捣粗罗为散。每服五钱。以水一大盏。入生姜半分。枣三枚。煎至五分。去滓
。不计时候温服。
治伤寒七日不解。心烦。肠中有结燥。谵语。宜服柴胡散方。\x
柴胡（二两去芦头） 半夏（一两汤洗七遍去滑） 赤芍药（一两） 甘草（半两炙微
赤锉）
知母
参（一
两去
上件药。捣粗罗为散。每服四钱。以水一中盏。入生姜半分。煎至五分。去滓。不计时
候。温温频服。稍利为度。
伤寒病到了第七天，按照常规法则应当痊愈，这是因为阴阳各经的病邪传变已经终结的缘故。如果七天以后，病情反而加重，这是将要发生“再经病”的表现。所谓再经病，是指经络再次受到病邪侵袭。
治疗伤寒七天未解，出现头痛，体内有热，大肠干燥秘结，服用承气汤后，如果小便变得清长，说明病邪不在里。
药材：桂枝（一两）、赤芍药（一两）、甘草（一两，炙至微红并切碎）、麻黄（一两，去根和节）、川芎（一两）、柴胡（一两，去苗）、浓朴（二两，去粗皮，涂生姜汁炙至香熟）。
制法与用法：以上药物捣碎过粗罗筛成散剂。每次服用四钱，加水一大盏，放入生姜半块、大枣三枚，煎煮至剩余六分，滤去药渣。不分时候，趁热服用，服药后覆盖衣被以取汗。如果行走十里路仍未出汗，可再服一次。
治疗伤寒七天，脉象浮，发热无汗，口渴想喝水，但没有表证，适宜服用知母散方。
药材：知母（一两）、石膏（二两）、甘草（半两，炙至微红并切碎）、粳米（半两）、人参（半两，去芦头）、葛根（半两，切碎）。
制法与用法：以上药物全部切碎，加水三大盏半，煎煮至两盏，滤去药渣。不分时候，分五次温服。
治疗伤寒七天，发热，出汗但病不解，心中痞塞坚硬，适宜服用前胡汤方。
药材：前胡（三两，去芦头）、赤茯苓（二两）、白术（二两）、川大黄（一两，切碎微炒）、赤芍药（一两，去粗皮）。
制法与用法：以上药物捣碎过粗罗筛成散剂。每次服用五钱，加水一大盏，放入生姜半块、大枣三枚，煎煮至剩余五分，滤去药渣。不分时候，温服。
治疗伤寒七天，经过剧烈泻下后，脉象沉迟，手足厥冷，咽喉不利，胸膈烦躁，适宜服用麻黄散方。
药材：麻黄（二两，去根和节）、当归（一两，切碎微炒）、川升麻（一两）、知母（一两）、赤芍药（一两）、天门冬（一两，去心）、白术（一两）。
制法与用法：以上药物捣碎过粗罗筛成散剂。每次服用五钱，加水一大盏，放入生姜半块、大枣三枚，煎煮至剩余五分，滤去药渣。不分时候，温服。
治疗伤寒七天未解，心烦，肠中有燥屎结聚，说胡话（谵语），适宜服用柴胡散方。
药材：柴胡（二两，去芦头）、半夏（一两，用汤洗七遍去滑腻）、赤芍药（一两）、甘草（半两，炙至微红并切碎）、知母（一两）、人参（一两，去芦头）。
制法与用法：以上药物捣碎过粗罗筛成散剂。每次服用四钱，加水一中盏，放入生姜半块，煎煮至剩余五分，滤去药渣。不分时候，温热频服，以大便稍通利为度。
When cold damage (Shanghan) reaches the seventh day, according to standard pathological laws, it should resolve, as the transmission of pathogens through the Yin and Yang meridians has concluded. If after the seventh day the condition worsens instead, it indicates the onset of a "re-meridian disease" (Zai Jing Bing). A re-meridian disease refers to the meridians receiving pathogenic invasion again.
For treating cold damage that persists beyond seven days, presenting with headache, internal heat, and dry constipation of the large intestine: After administering Chengqi Tang (Cassia Bark Decoction), if the urine becomes clear, it indicates the pathology is not in the interior.
Ingredients: Guizhi (Cinnamon Twig, 1 liang), Chi Shaoyao (Red Peony Root, 1 liang), Gancao (Licorice Root, 1 liang, honey-fried until slightly red and chopped), Mahuang (Ephedra Herb, 1 liang, roots and nodes removed), Xiong (Sichuan Lovage Rhizome, 1 liang), Chaihu (Bupleurum Root, 1 liang, sprouts removed), Houpo (Magnolia Bark, 2 liangs, coarse skin removed, coated with fresh ginger juice and fried until fragrant).
Preparation and Administration: The above ingredients are coarsely ground and sieved. Take 4 qian per dose, add 1 da zhen (large cup) of water, half a piece of fresh ginger, and three jujubes. Decoct until reduced to 6 fen. Strain. Drink hot at any time. Cover with clothing to induce sweating. If no sweat occurs after walking for ten li, administer another dose.
For treating cold damage persisting for seven days, presenting with a floating pulse, fever, absence of sweating, thirst with desire to drink water, but without exterior syndrome: Zhimu San (Anemarrhena Powder) is suitable.
Ingredients: Zhimu (Anemarrhena Rhizome, 1 liang), Shigao (Gypsum Fibrosum, 2 liangs), Gancao (Licorice Root, 0.5 liang, honey-fried until slightly red and chopped), Jingsmi (Glutinous Rice, 0.5 liang), Renshen (Ginseng Root, 0.5 liang, rhizomes removed), Gegen (Pueraria Root, 0.5 liang, chopped).
Preparation and Administration: All ingredients are chopped. Add 3.5 da zhen of water and decoct until reduced to 2 da zhen. Strain. Divide into five warm doses, taken at any time.
For treating cold damage persisting for seven days, presenting with fever, sweating that does not relieve the condition, and epigastric fullness/hardness: Qianhu Tang (Peucedanum Decoction) is suitable.
Ingredients: Qianhu (Peucedanum Root, 3 liangs, rhizomes removed), Chi Fuling (Red Poria, 2 liangs), Baizhu (Atractylodes Macrocephala Rhizome, 2 liangs), Dahuang (Rhubarb Root and Rhizome, 1 liang, chopped and lightly stir-fried), Chi Shaoyao (Red Peony Root, 1 liang, coarse skin removed).
Preparation and Administration: The above ingredients are coarsely ground and sieved. Take 5 qian per dose, add 1 da zhen of water, half a piece of fresh ginger, and three jujubes. Decoct until reduced to 5 fen. Strain. Take warm at any time.
For treating cold damage persisting for seven days, following severe purgation, presenting with a deep and slow pulse, cold extremities, throat obstruction, and chest/epigastric irritability: Mahuang San (Ephedra Powder) is suitable.
Ingredients: Mahuang (Ephedra Herb, 2 liangs, roots and nodes removed), Danggui (Angelica Sinensis Root, 1 liang, chopped and lightly stir-fried), Shengma (Cimicifuga Rhizome, 1 liang), Zhimu (Anemarrhena Rhizome, 1 liang), Chi Shaoyao (Red Peony Root, 1 liang), Tianmendong (Asparagus Fern Tuber, 1 liang, hearts removed), Baizhu (Atractylodes Macrocephala Rhizome, 1 liang).
Preparation and Administration: The above ingredients are coarsely ground and sieved. Take 5 qian per dose, add 1 da zhen of water, half a piece of fresh ginger, and three jujubes. Decoct until reduced to 5 fen. Strain. Take warm at any time.
For treating cold damage persisting for seven days, presenting with mental restlessness, intestinal dryness/fecal impaction, and delirious speech: Chaihu San (Bupleurum Powder) is suitable.
Ingredients: Chaihu (Bupleurum Root, 2 liangs, rhizomes removed), Banxia (Pinellia Tuber, 1 liang, washed seven times in boiling water to remove acridity), Chi Shaoyao (Red Peony Root, 1 liang), Gancao (Licorice Root, 0.5 liang, honey-fried until slightly red and chopped), Zhimu (Anemarrhena Rhizome, 1 liang), Renshen (Ginseng Root, 1 liang, rhizomes removed).
Preparation and Administration: The above ingredients are coarsely ground and sieved. Take 4 qian per dose, add 1 zhong zhen (medium cup) of water, and half a piece of fresh ginger. Decoct until reduced to 5 fen. Strain. Take warm frequently at any time. Stop when slight bowel movement is achieved.