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[Formula Song] Damp-toxin flowing accumulation occurs on the lower legs and shins; the sore's apex resembles an ox eye with diffuse swelling. Purple color indicates mildness, black indicates severity; upon ulceration, pus exudes, healthy flesh rots, and healing is delayed for a long time. This arises from violent wind and rain, where cold-dampness and summer-heat invade the *Couli* (the interstitial spaces between skin and muscle), causing pathology in the muscles. At the initial stage, urgently administer Fangfeng Tongsheng San (Windproof Unblocking Hero Powder) added with Mugua (Papaya), Niuxi (Achyranthes Root), Fangji (Stephania Root), and Cangzhu (Atractylodes Rhizome) to eliminate the pathogen; if there is evening fever in the lower legs and shins, it is appropriate to take Danggui Nian Tong Tang (Angelica Relieving Pain Decoction) added with Niuxi. For external treatment, initially apply Sanmiao San (Three Marvels Powder); once swelling and pain completely subside, switch to applying Qingfen San (Calomel Powder) to promote healing, which will be effective. If it develops circumferentially around the shin, it is named Guatechan (Gourd Vine Wrapping), presenting with several nodules that swell, hurt, and rot continuously over time; this also results from damp-heat sinking downward, and the treatment method is the same as above.

Formula: Qingfen San (Calomel Powder)
Composition: Qinfen (Calomel, 1.5 qian), Huangdan (Lead Tetroxide), Huangbai (Phellodendron Bark), Mituosen (Litharge), Gaomo Cha (High-end Tea), Ruxiang (Frankincense) (each 3 qian), Shexiang (Musk) (0.5 qian).
Grind all into fine powder. First, wash the affected area with decoction of scallions, then apply this medicine.

[Formula Song] Calomel, Lead Tetroxide, Phellodendron Bark, and Litharge, mixed with tea, Frankincense, and Musk ground together, treat damp-toxin flowing accumulation causing scrotal sores, resolving decay, removing dampness, and relieving pain.

Another Formula: Fangfeng Tongsheng San (See Head Bald Sores section)
Danggui Nian Tong Tang (See Thigh Wandering Wind section)
Sanmiao San (See Abdominal Umbilical Carbuncle section)

[Formula Song] Kidney-Qi Wandering Wind arises in the calf; redness and swelling resemble cloud patches, painful as if roasted by fire. The syndrome is caused by Kidney Fire accumulating internally, Bladder Qi stagnation, and external invasion of Wind Pathogen.

[Annotation] This syndrome often occurs in individuals with Kidney Deficiency. The calves are red and swollen, shaped like cloud patches, wandering without fixed location, and painful as if roasted by fire. It is formed by internal accumulation of Kidney Fire, external invasion of Wind Pathogen, and Bladder Qi stagnation. Initially take Zisu Liuqi Yin (Perilla Moving Qi Drink), followed by Binglang Wan (Areca Nut Pill); externally, grind tofu and mix with Huangbai powder, apply as a poultice for significant effect.

Formula: Zisu Liuqi Yin (Perilla Moving Qi Drink)
Composition: Zisu (Perilla Leaf), Huangbai (Phellodendron Bark), Mugua (Papaya), Binglang (Areca Seed), Xiangfu (Cyperus Rhizome), Chenpi (Tangerine Peel), Chuanxiong (Sichuan Lovage Rhizome), Houpo (Magnolia Bark, stir-fried with ginger juice), Baizhi (Angelica Dahurica Root), Cangzhu (Atractylodes Rhizome, soaked in rice water, stir-fried), Wuyao (Lindera Root), Jingjie (Schizonepeta Spike), Fangfeng (Saposhnikovia Root), Gancao (Licorice Root), Duhuo (Angelica Pubescens Root), Zhike (Bitter Orange Fruit, stir-fried with bran).
Equal parts of each, add three slices of ginger and one jujube, decoct in water and take orally.

[Formula Song] Perilla Moving Qi Drink contains Phellodendron, Papaya, Areca Seed, Cyperus, Tangerine Peel, Sichuan Lovage, Magnolia Bark, Angelica Dahurica, Atractylodes, Lindera, Schizonepeta, Saposhnikovia, Licorice, Angelica Pubescens, and Bitter Orange; taking it for Kidney-Qi Wandering Wind is most auspicious.

Another Formula: Binglang Wan (Areca Nut Pill)
Composition: Binglang (Areca Seed), Zhike (Bitter Orange Fruit, stir-fried with bran, each 2 liang), Mugua (Papaya, 1.5 liang), Muxiang (Vladimiria Root, 1 liang), Dahuang (Rhubarb Root, 4 liang).
Grind into fine powder, make pills with refined honey, size of Sophora seeds. Take 30 pills per dose, swallowed with plain boiled water on an empty stomach; swallowing with yellow wine is also acceptable.

[Formula Song] Areca Seed, Bitter Orange, and Papaya relieve pain; Vladimiria and Rhubarb made into honey pills; for redness, swelling, and pain of Kidney-Qi Wandering Wind, taking them on an empty stomach with water leads to natural recovery.