When a zang-organ disease extends to the meridians: In Taiyin disease, if the pulse is floating, sweating may be induced; Guizhi Tang (Cinnamon Twig Decoction) is appropriate (this refers to Taiyin meridian disease with Guizhi Tang syndrome). If there are diarrhea, abdominal fullness, and body pain, one should first warm the interior and then attack the exterior. To warm the interior, Sini Tang (Frigid Extremities Decoction) is appropriate; to attack the exterior, Guizhi Tang is appropriate (this refers to the coexistence of Sini Tang and Guizhi Tang syndromes). Originally suffering from Taiyang disease, if the physician erroneously used purgation, resulting in abdominal fullness and frequent pain, this belongs to Taiyin disease (Guizhi Jia Shaoyao Tang syndrome); if there is severe pain due to excess and stagnation, Guizhi Jia Dahuang Tang (Cinnamon Twig Decoction plus Rhubarb) is indicated (this refers to the syndrome of Guizhi Tang plus Dahuang).

Disease within the Zang organs: The defining symptoms of Taiyin disease include abdominal fullness, vomiting, inability to eat, worsening diarrhea, and spontaneous abdominal pain. If purgation is mistakenly applied, it will inevitably lead to hardness and obstruction below the chest. If accompanied by fever and headache, but the pulse is unexpectedly deep and the condition does not improve, along with body pain, one should warm the interior; Sini Tang is appropriate (Sini Tang syndrome). In cases of diarrhea with undigested food, the exterior should not be attacked; forcing sweat will inevitably cause abdominal fullness (diarrhea with clear grains syndrome). Spontaneous diarrhea without thirst indicates Taiyin disease, caused by cold in the zang organs; warming treatment is required (Sini Tang syndrome). In Shanghan (cold damage), if there is heat in the chest, pathogenic qi in the stomach, abdominal pain, and a desire to vomit, Huanglian Tang (Coptis Decoction) is indicated. In Taiyin disease, if the pulse is weak and there is continuous spontaneous bowel movement, even if Dahuang (Rhubarb) and Shaoyao (Peony Root) were to be used, their dosages should be reduced because the stomach qi is weak and easily disturbed (syndrome requiring reduced dosage of Shaoyao and Dahuang). In Shanghan, if the pulse is floating and slow, and the hands and feet are naturally warm, the disease is associated with Taiyin; the body should become jaundiced, but if urination is normal, jaundice will not occur. After seven or eight days, although sudden irritability and diarrhea occurring more than ten times a day may happen, it will stop spontaneously because the spleen's righteous qi is restored and putrefied filth is being expelled (signs of self-hearing in sudden irritability and diarrhea). In Shanghan after seven or eight days, if the body is yellow like an orange peel, urination is difficult, and the abdomen is slightly full, Yinchen Hao Tang (Artemisiae Scopariae Decoction) is indicated. If stagnant heat is trapped inside in Shanghan, jaundice will surely occur; Mahuang Lianqiao Chixiaodou Tang (Ephedra, Forsythia, and Red Bean Decoction) is indicated. If Shanghan presents with jaundice and fever, Zhizi Bopi Tang (Gardeniae and Phellodendron Bark Decoction) is indicated. After inducing sweat in Shanghan, if the body and eyes turn yellow because cold-dampness remains unresolved in the interior, purgation is contraindicated; one should seek treatment among methods for cold-dampness (cold-damp jaundice syndrome). In Taiyin wind-stroke, if the four limbs are painful and irritable, and the pulse is faint, choppy, yet long, recovery is imminent (wind-stroke approaching resolution). The time when Taiyin disease tends to resolve is from Hai hour to Chou hour.

Formulas:
Sini Tang (Frigid Extremities Decoction): Gancao (Licorice Root), Ganjiang (Dried Ginger), Fuzi (Aconite Root).
Huanglian Tang (Coptis Decoction): Huanglian (Coptis Rhizome), Banxia (Pinellia Tuber), Renshen (Ginseng Root), Gancao (Licorice Root), Dazao (Jujube Fruit), Ganjiang (Dried Ginger), Guizhi (Cinnamon Twig).
Guizhi Jia Shaoyao Tang (Cinnamon Twig Decoction plus Peony Root): Guizhi (Cinnamon Twig), Gancao (Licorice Root), Dazao (Jujube Fruit), Shengjiang (Fresh Ginger), Shaoyao (Peony Root); add three liang of Shaoyao to Guizhi Tang.
Guizhi Jia Dahuang Tang (Cinnamon Twig Decoction plus Rhubarb): Guizhi (Cinnamon Twig), Gancao (Licorice Root), Dazao (Jujube Fruit), Shengjiang (Fresh Ginger), Shaoyao (Peony Root), Dahuang (Rhubarb Root).
Yinchen Hao Tang (Artemisiae Scopariae Decoction): Yinchenhao (Artemisiae Scopariae Herba), Zhizi (Gardeniae Fructus), Dahuang (Rhubarb Root).
Mahuang Lianqiao Chixiaodou Tang (Ephedra, Forsythia, and Red Bean Decoction): Mahuang (Ephedrae Herba), Xingren (Prunus Armeniacae Semen), Shengjiang (Fresh Ginger), Shengzibapi (Broussonetiae Cortex), Lianqiao (Forsythiae Fructus), Gancao (Licorice Root), Dazao (Jujube Fruit), Chixiaodou (Vigna Angularis Seed).
Zhizi Bopi Tang (Gardeniae and Phellodendron Bark Decoction): Zhizi (Gardeniae Fructus), Gancao (Licorice Root), Huangbipi (Phellodendri Cortex).