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(Zhang Zhongjing) Treats Jueyin Cold Damage (Jueyin Shaohang). Symptoms include coldness of the hands and feet, and a fine pulse that is nearly imperceptible.
Danggui (Angelicae Sinensis Radix), Guizhi (Cinnamomi Ramulus), Shaoyao (Paeoniae Radix), Xixin (Asari Radix et Rhizoma) [each 3 liang], Gancao (Glycyrrhizae Radix et Rhizoma, honey-fried), Tongcao (Tetrapanacis Medulla, i.e., Mutong [Akebiae Caulis]), Dazao (Zizyphi Fructus) [25 pieces].
Zhang Zhongjing also named it Sini Decoction with Evodia and Ginger.
The name "Sini" (Reversal Cold) has many variations, but the etiology differs between cold and heat syndromes. This case is due to wind-cold invading the blood vessels causing reversal coldness; therefore, Danggui, a pungent-warm herb that moves qi within the blood, is used as the principal agent.

(Zhang Zhongjing) Treats Shaoyin Cold Damage presenting with abdominal pain, difficulty in urination, heaviness and pain in the four limbs, and spontaneous diarrhea, indicating the presence of water qi. There may also be cough or vomiting, or conversely, free urination. (In the Shanghan Lun: A deep and fine pulse, a sensation of wanting to vomit but unable to do so, irritability, and a desire only to sleep, along with spontaneous diarrhea and thirst after five or six days, constitute a Shaoyin syndrome. When awake, qi circulates in the yang aspect; when asleep, qi circulates in the yin aspect. However, this process must begin from Shaoyin; thus, the Shaoyin syndrome manifests as a desire only to sleep, caused by an excess of yin qi. If disturbed by yang heat, the situation reverses. Zhou Yangjun stated: "Desire only to sleep" does not mean one can actually fall asleep, but rather feels drowsy and dream-like. Shaoyin belongs to the Kidney; kidney disease fails to control water, leading to stagnation of fluid and formation of water qi. Abdominal pain indicates severe internal cold-dampness. Heaviness and pain in the four limbs indicate severe external invasion by cold. Difficulty in urination and spontaneous diarrhea result from dampness prevailing, causing failure to separate clear turbid fluids.) Furthermore, after treating Taiyang syndrome with sweating, if the illness persists despite sweating, accompanied by persistent fever, palpitations, vertigo, muscle twitching, and trembling as if about to collapse, this indicates deficiency of qi and aversion to cold. (Excessive sweating leads to palpitations. Sweat is the fluid of the Heart; loss of sweat causes Heart deficiency, akin to a fish jumping out of water. Water stagnating below the heart also causes palpitations. The Heart belongs to Fire, and Fire fears Water, hence palpitations. Internal movement of deficient yang causes vertigo. Excessive sweating depletes fluids, failing to nourish muscles and sinews, leading to twitching and tremors. Trembling as if about to collapse indicates desperate loss of yang, where the patient wishes to lie prostrate. Cheng Jiaoqian said: Everyone knows that excessive sweating leads to loss of yang. However, there is the defensive yang, which is the master of the body's wei and ying. Deficiency of this yang leads to unceasing leakage of sweat, aversion to cold, and body pain. There is the yang of the Danzhong (chest), which is the master of the upper jiao Heart and Lungs. Deficiency of this yang leads to crossing hands over the heart and Ben Tun (fleeing pig) syndrome. There is the true yang of the Kidney, master of the lower jiao. Deficiency of this yang leads to fever, vertigo, palpitations, and trembling as if collapsing. There is the stomach yang, master of the transformation and transportation of food and fluids in the middle jiao. Deficiency of this yang... leads to rebellion, treated according to method. Kidney yang deficiency leads to flooding disorders. Thus, it overwhelms the Heart... It is said: Although sweating occurs, fever does not subside... everywhere indicates loss of yang...
Fuzi (Aconiti Lateralis Radix Praeparata, 1 piece, processed), Baizhu (Atractylodis Macrocephalae Rhizoma, 2 liang, stir-fried), Fuling (Poria), Shaoyao (Paeoniae Radix), Shengjiang (Zingiberis Rhizoma Recens, 3 liang). If cough arises from water-cold clashing, add Wuweizi (Schisandrae Fructus), Xixin (Asari Radix et Rhizoma), and Ganjiang (Zingiberis Rhizoma). If urination is free, remove Fuling (due to its diuretic nature). If diarrhea occurs, remove Shaoyao and add Ganjiang (because Shaoyao is sour and cold, while Ganjiang is pungent and hot). If vomiting occurs, remove Fuzi, retain Fuling and Baizhu to tonify spleen and promote urination, thereby expelling kidney pathogenic factors and treating palpitations. Shengjiang and Fuzi restore yang and benefit defensive qi, strengthening true fire and driving away deficient cold. Shaoyao is sour and astringent, able to consolidate yin and harmonize the nutritive level, treating abdominal pain. (Tonifying yang must simultaneously harmonize yin, avoiding excess. The Classics state: When cold prevails, treat with pungent herbs... Formula assists... Yang follows... Water... According to Qing... method... just see... to eliminate...
Remove Shengjiang, add Renshen (Panax Ginseng Radix et Rhizoma, 2 liang), named Fuzi Tang. (Zhang Zhongjing) Treats Shaoyin disease with body pain, cold hands and feet, joint pain, and a deep pulse. (Pain from contraction... Disease, obtaining... Yang, abdomen... Has yin qi... Back slightly aversive to cold... Disease, interior... Should use...)