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The Kidney governs the feet. If Kidney deficiency allows Wind-Dampness to clash and invade the feet and knees, it is named Hongxiangjiao (Gouty Arthritis/Rheumatism of the lower limbs). This occurs because Qi and Blood are stagnant, and Damp-Toxic fumes are abundant in the skin and interstices.

Shinan Wan (Stone Nan Pill) [Source: *Zhi Zhi Fang*] specifically treats Wind-Toxin causing foot swelling and sores, or tendon spasms with heavy pain.
Herbs: *Acanthopanacis Senticosi Caulis* (Shinan Ye), *Coicis Semen* (Yiyi Ren), *Armeniacae Semen Amarum* (Xingren, soaked in decoction, peeled, stir-fried until slightly red), *Pharbitidis Semen* (Qianniu, stir-fried ripe), *Arecae Pericarpium* (Dafuzi, used with peel), *Ligustici Chuanxiong Rhizoma* (Chuanxiong), *Dipsaci Radix* (Xuduan), *Cnidii Rhizoma* (Qixian - note: text says "Xi", likely referring to a knee-related herb or typo for Qixian/Cnidium, kept as literal translation contextually implies knee joint herbs), each 3 liang.
Preparation: Soak, steam, grind into paste, and form pills.

Loulu Wan (Euphorbiae Fissurae Pill) [Source: *Sheng Hui Fang*] specifically treats severe Hongxiangjiao swelling with sores that do not heal for a long time, with continuous flow of pus and blood, and unceasing pain.
Herbs: *Euphorbiae Fissurae Radix* (Loulu, 1 liang), *Polygonati Rhizoma* (Weirui, 1 liang), *Areca Seed* (Binglang, 1 liang), *Aurantii Fructus Immaturus* (Zhike, 1 liang, stir-fried with bran, remove core, cut into pieces), *Gentianae Macrophyllae Radix* (Qinjiao, 1 liang, remove sprouts), *Saposhnikoviae Radix* (Fangfeng, 1 liang, cut into pieces, stir-fried lightly until scorched), *Astragali Radix* (Huangqi, 1 liang, cut into pieces, stir-fried lightly).
Preparation: Grind into fine powder, mix with refined honey, and pound/beaten 300-200 times.

Xijiao San (Rhinoceros Horn Powder) [Source: *Sheng Hui Fang*] treats Hongxiangjiao generating toxins, sore swelling and pain, mental restlessness and heat.
Herbs: *Rhinocerotis Cornu* (Xijiao xie, 3 fen), *Gastrodiae Rhizoma* (Tianma, 3 fen), *Notopterygii Rhizoma et Radix* (Qianghuo, 3 fen), *Aurantii Fructus Immaturus* (Zhike, 3 fen, stir-fried with bran, remove core), *Saposhnikoviae Radix* (Fangfeng, 3 fen, remove radicle head), *Astragali Radix* (Huangqi, 3 fen, processed), *Dinoceratis Cornu* (Wushe - Note: Text says "She" preceded by Wu, likely Wushe Snake or similar, context implies snake medicine), 1 liang, soaked in wine, skin and bones removed, processed until yellow).
Usage: Use one zhong of water, add half fen of fresh ginger, decoct until... (text missing, typically reduce to specific volume, strain and take).

[Source: *Sheng Hui Fang*] Treats Hongxiangjiao Wind-Toxin, excessive generation of sores, unceasing swelling and pain.
Herbs: *Arctii Fructus* (Niubangzi, 1 liang, lightly stir-fried), *Aurantii Fructus Immaturus* (Zhike, 1 liang, stir-fried with bran until slightly yellow, remove core), *Saposhnikoviae Radix* (Fangfeng, 0.5 liang, remove radicle head), *Coicis Semen* (Yiyi Ren, 3 fen), *Scrophulariae Radix* (Xuanshen, 3 fen), *Lycii Cortex* (Digupi, 1 liang, remove heart), *Astragali Radix* (Huangqi, 1 liang, processed until slightly yellow).
Preparation: Grind all into powder.

Qinjiao San (Gentian Macrophylla Powder) [Source: *Sheng Hui Fang*] specifically treats Hongxiangjiao Wind-Toxin, generating sores with swelling and pain.
Herbs: *Gentianae Macrophyllae Radix* (Qinjiao, 1 liang, remove radicle), *Scrophulariae Radix* (Xuanshen, 1 liang), *Lycii Cortex* (Digupi, 1 liang), *Angelicae Pubescentis Radix* (Duohuo, 1 liang), *Astragali Radix* (Huangqi, 1 liang), *Aurantii Fructus Immaturus* (Zhike, 1 liang, stir-fried with bran).
Usage: Decoct in water until 60% remains, strain and take.

Case for treating foot swelling: A 61-year-old man had severe foot swelling and sores. After suddenly eating pork and feeling unwell, a doctor treated him with purgatives, leading to slight improvement. Later, he contracted Wind while going out; after sweating, his head suddenly swelled up purple, he produced much saliva, and had floating blisters and small sores on his earlobes with yellow sweat. He was treated with Xiao Xuming Tang with double the dose of Qianghuo, decocted and taken, resulting in recovery.

Loulu Wan treats severe Hongxiangjiao swelling due to sores that have persisted for years without healing, with continuous flow of pus and blood. This is caused by Wind-Toxin fumes stagnating from taking medicines and alcohol during winter, scattering in the interstices. It is suitable to take this formula. This formula also treats wind itching and various tinea/psoriasis diseases, lightens the waist and legs, and unblocks the Large Intestine.

Formula for treating Heat-Toxin Qi in the Lung:
Herbs: *Euphorbiae Fissurae Radix* (Loulu), *Polygonati Rhizoma* (Weirui), *Dinoceratis Cornu* (Wushe Fu, processed, each 2 qian 4 fen), *Immature Aurantii Fructus* (Zhishi, 1 qian 6 fen, processed), *Sophorae Flavescentis Radix* (Kushen, 1 jin, pounded to remove tendons and veins to take starch), *Gentianae Macrophyllae Radix* (Qinjiao), *Atractylodis Macrocephalae Rhizoma* (Baizhu), *Astragali Radix* (Huangqi, each 1 qian).
Preparation: Grind into powder, take 40 pills per dose, gradually increasing.
Usage: Take with wine.

Another set of herbs: *Arctii Radix* (Niubang Gen, 3 da sheng), *Immature Aurantii Fructus* (Zhishi, 8 liang, processed), *Magnetitum* (Maoci Shi, 1 jin, wrapped in silk), *Coicis Semen* (Yiyi Ren, 1 sheng), *Scrophulariae Radix* (Xuanshen, 6 liang), *Dinoceratis Cornu* (Wushe Fu).
Usage: Decoct in 1 dou of good non-ashy wine.

Bailian Tang Wash Formula treats Hongxiangjiao Wind-Toxin, sore swelling and pain.
Herbs: *Euphorbiae Fissurae Radix* (Loulu, cut, 1 da sheng), *Ampelopsis Radix* (Bailian, 5 liang), *Morus Alba Bark* (Huai Baipi, cut), *Tribuli Fructus* (Jili Zi), *Acanthopanacis Cortex* (Wujia Genpi, cut, each 1 da sheng), *Glycyrrhizae Radix et Rhizoma* (Gancao, 3 liang).
Usage: Decoct for washing the affected area.