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[Fangji Yin]
Treats Hong Kong Jiao (a disease characterized by swelling and pain in the feet and legs) causing swelling and pain in the lower legs and shins, accompanied by aversion to cold and high fever.

Formula Composition: Fangji (Stephaniae Tetrandrae Radix), Mutong (Akebiae Caulis), Binglang (Arecae Semen), Shengdi (Rehmanniae Radix Praeparata per wine-frying), Chuanxiong (Ligustici Chuanxiong Rhizoma), Baizhu (Atractylodis Macrocephalae Rhizoma stir-fried), Cangzhu (Atractylodis Rhizoma stir-fried with salt), Huangbai (Phellodendri Cortex Praeparated per wine-frying), Gancao (Glycyrrhizae Radix et Rhizoma roasted).

This formula primarily acts on the Foot-Taiyang Bladder Meridian. Fangji promotes water metabolism and dispels wind-dampness, draining damp-heat from the Lower Jiao; Binglang breaks up accumulations and promotes diuresis, guiding the actions of other herbs downward; Mutong descends Heart Fire... [Note: The original text contains apparent dislocations or interpolations regarding contraindications such as "contraindicated for certain diseases," "rapid and long pulse," "thin and dry blood," "constipation," and partial pharmacological explanations like "moving within the middle." These are retained in their respective positions according to the source structure.]

[Danggui Niantong Tang] (Attributed to Li Dongyuan)
Treats conditions where damp-heat intertwines, causing severe pain in the limbs and joints, heaviness in the shoulders and back; or pain on one side of the body; or Hong Kong Jiao with swelling and pain, sores on the feet and knees with continuous purulent discharge; as well as jaundice caused by damp-heat, with a pulse that is deep, excess, tight, rapid, moving, or slippery. (Note: Dampness causes swelling, heat causes pain. Sores and swelling on the feet and knees result from damp-heat sinking downward; jaundice results from damp-heat steaming the Spleen and Stomach. Hong Kong Jiao is mostly due to water-dampness, but may also involve wind or cold. If damp-heat prevails and causes disease, it may manifest as vesicles, red swollen carbuncles, or colic-like pain attacking upwards and downwards. This decoction can be used with modifications for treatment. Regarding meridians: the anterior aspect of the hands and feet belongs to the Yangming Meridian, the posterior aspect to the Taiyang Meridian, the lateral aspect to the Shaoyang Meridian, the medial aspect to the Jueyin Meridian, the anteromedial aspect to the Taiyin Meridian, and the posteromedial aspect to the Shaoyin Meridian. To determine this, let the arms hang naturally by the sides close to the body; the thumb is anterior, and the little finger is posterior. For pain in the hands and feet, one must distinguish which meridian is involved and use herbs of that specific meridian as guiding agents to promote the flow of Qi and Blood for recovery: Taiyang uses Qianghuo and Fangfeng; Yangming uses Shengma and Baizhi...)

Formula Composition: Yinchén (Artemisiae Scopariae Herba Praeparated per wine-frying), Qianghuo (Notopterygii Rhizoma et Radix), Fangfeng (Saposhnikoviae Radix), Shengma (Cimicifugae Rhizoma), Gegen (Puerariae Lobatae Radix), Cangzhu (Atractylodis Rhizoma), Baizhu (Atractylodis Macrocephalae Rhizoma), Gancao (Glycyrrhizae Radix et Rhizoma roasted), Huangqin (Scutellariae Radix Praeparated per wine-frying), Kushen (Sophorae Flavescentis Radix)...

This formula primarily acts on the Foot-Taiyang and Foot-Yangming Meridians. The original text states: Qianghuo penetrates the joints, and Fangfeng disperses retained dampness; they serve as the Sovereign (Jun) herbs. Shengma and Gegen have light aromas and guide the medicinal action upward; Kushen... Huangqin... Gancao... They eliminate retained fluid retention, serving as Assistant (Zuo) and Envoy (Shi) herbs. They dissipate dampness from both above and below, allowing stagnant Qi to become unblocked and free. (The *Yuji Wei Yi* records: This formula was originally created by Li Dongyuan to treat damp-heat in Hong Kong Jiao...)