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Scallion White (Congbai), Dried Ginger (Ganjiang), Aconite Root (Fuzi)
Indicated for Shaoyin disease (disease syndrome caused by pathogenic invasion of the Shaoyin channel) presenting with diarrhea and a faint pulse. The *Neijing* states: "The Kidney dislikes dryness; one should consume acrid substances to moisten it." The acridity of Scallion White (Congbai) unblocks Yang Qi; the acridity of Dried Ginger (Ganjiang) and Aconite Root (Fuzi) disperses Yin-Cold.

Scallion White (Congbai), Dried Ginger (Ganjiang), Aconite Root (Fuzi)
Indicated for Shaoyin disease presenting with diarrhea and a faint pulse. The *Neijing* states: "The Kidney dislikes dryness; one should consume acrid substances to moisten it." The acridity of Scallion White (Congbai) unblocks Yang Qi; the acridity of Dried Ginger (Ganjiang) and Aconite Root (Fuzi) disperses Yin-Cold.

Scallion White (Congbai), Dried Ginger (Ganjiang), Aconite Root (Fuzi)
Indicated for Shaoyin disease presenting with diarrhea and a faint pulse. The *Neijing* states: "The Kidney dislikes dryness; one should consume acrid substances to moisten it." The acridity of Scallion White (Congbai) unblocks Yang Qi; the acridity of Dried Ginger (Ganjiang) and Aconite Root (Fuzi) disperses Yin-Cold.

Angelica Sinensis Radix (Danggui), Cinnamon Twig (Guizhi), Peony Root (Shaoyao), Asarum Root (Xixin), Licorice Root (Gancao), Tetrapanax Pith (Tongcao), Jujube Fruit (Dazao)
Indicated for cold extremities with reversal cold (Juehan) and a fine pulse nearly imperceptible. Cold extremities with reversal cold occur because Yang Qi is deficient externally and cannot warm the four extremities. A fine pulse nearly imperceptible occurs because Yin-Blood is weak internally and cannot fill the meridians. Cinnamon Twig (Guizhi) and Asarum Root (Xixin) regulate the defensive Yang Qi on the exterior; Angelica Sinensis Radix (Danggui) and Peony Root (Shaoyao) harmonize the nutritive Yin-Essence within. Tetrapanax Pith (Tongcao) promotes circulation and unblocks, while Licorice Root (Gancao) and Jujube Fruit (Dazao) moderate the Middle Jiao. Thus, both Yin and Yang receive treatment, and how could reversal cold fail to heal?

Angelica Sinensis Radix (Danggui), Licorice Root (Gancao), Tetrapanax Pith (Tongcao), Peony Root (Shaoyao), Cinnamon Twig (Guizhi), Asarum Root (Xixin), Fresh Ginger (Shengjiang), Jujube Fruit (Dazao), Evodia Fruit (Wuzhuyu)
Indicated for chronic internal cold, presenting with cold extremities, reversal cold, and a fine pulse nearly imperceptible. Although the symptoms are identical to the above, in patients with chronic cold, Yang Qi is further weakened. Without Fresh Ginger (Shengjiang) and Evodia Fruit (Wuzhuyu), it is impossible to sufficiently warm the four extremities. However, why is Si Ni Tang not used? This is because cold extremities indicate that the pathogen is still shallow. According to Zhang Zhongjing, whenever "Si Ni" (Four Reversals) is mentioned, it is an abbreviation for "cold limbs with reversal" (Sizhi Niling). The pathogen is shallow, and Zhang Zhongjing's terminology is rigorous and precise. One must read these texts together to clearly understand the severity, shallowness, and depth of the condition at a glance. Some say that limb reversal cold, or simply "Si Ni," all refer to mild conditions.

Ephedra Stem (Mahuang), Corydalis Rhizome (Shengma), Angelica Sinensis Radix (Danggui), Anemarrhena Rhizome (Zhimu), Scutellaria Root (Huangqin), Polygonatum Rhizome (Weirui), Gypsum Fibrosum (Shigao), Atractylodes Macrocephala Rhizome (Baizhu), Dried Ginger (Ganjiang), Peony Root (Shaoyao), Asparagus Tuber (Tianmendong), Cinnamon Twig (Guizhi), Poria (Fuling), Licorice Root (Gancao)
In Shanghan (Cold Damage) disease lasting six or seven days, after severe purgation, if the Cun (inch) pulse is deep and slow, extremities are cold and reversed, the lower pulses are absent, there is throat discomfort, expectoration of pus and blood, and incessant diarrhea, this is considered difficult to treat. Mahuang Shengma Decoction (Mahuang Shengma Tang) is indicated. Six or seven days into Shanghan disease is when the pathogen transmits to the Jueyin channel. After severe purgation, Qi in the Lower Jiao becomes deficient, and Yang Qi sinks inward, causing the Cun pulse to be slow and extremities to become cold. The Jueyin channel passes through the diaphragm and follows the throat; therefore, throat discomfort and expectoration of pus and blood occur. This represents Liver Fire drying Lung Metal. If diarrhea continues, it cuts off the source of generation for Lung Metal, making it difficult to treat. For intense heat, sweating is used to release it; thus, Ephedra Stem (Mahuang) and Corydalis Rhizome (Shengma) are employed. For deficient Zheng Qi, acrid-moistening methods are used; thus, Angelica Sinensis Radix (Danggui), Dried Ginger (Ganjiang), and Cinnamon Twig (Guizhi) are used. For Lung heat, bitter-draining methods are used; thus, Anemarrhena Rhizome (Zhimu) and Scutellaria Root (Huangqin) are added. For exhausted fluids, sweet-moistening methods are used; thus, Poria (Fuling) and Atractylodes Macrocephala Rhizome (Baizhu) are added. Peony Root (Shaoyao) and Licorice Root (Gancao) restrain the Liver; Asparagus Tuber (Tianmendong) and Polygonatum Rhizome (Weirui) moisten the Lungs. Furthermore, Gypsum Fibrosum (Shigao) clears Stomach heat to prevent pathogens from the East (Liver) from invading the Central Qi (Spleen and Stomach).