夫肾主于脚，若肾虚肾为风湿所搏，攻于脚膝，则名香港脚。因其气血壅滞，湿毒瓦斯
盛，在于肤腠，不得宣通，故令脚上生疮也。若风毒不散，共疮渐增，黄水肿痛，身体壮
热，经久难瘥也。
犀角散 治香港脚风毒，生疮肿痛，心神烦热。
犀角屑 天麻 羌活（去芦） 枳壳（麸炒，去穣） 防风 黄 （各去芦） 白蒺藜 黄芩 白
鲜皮（各七钱半） 槟榔（一两） 甘草（炙，半两） 乌蛇（二两，酒浸）
上 咀。每服八钱，以水一中盏半，生姜五片，煎至一大盏。去渣温服，不拘时。
漏芦丸 治香港脚肿盛生疮，久不瘥，脓血长流疼痛。
漏芦 秦艽（各去芦） 葳蕤 枳壳（去穣，麸炒） 槟榔 川大黄（各一两） 防风 独活 黄
（各去芦） 黄芩 五加皮 赤芍药（各七钱半） 乌蛇（二两，酒浸）
上为细末，炼蜜和捣，二三百下，丸如梧子大。每服三四十丸，温酒送下，不拘时。
鹿茸丸 治香港脚，腿腕生疮。
鹿茸（酥炙，另捣成泥） 五味子 当归（去芦，二味为末） 熟地黄（捣膏）
上等分，酒糊和丸，梧子大。每服三四十丸，温酒或盐汤，食前下；次服后方
又方
川芎 当归（去芦，各等分）
上为细末。每服二三钱，煎荆芥汤调下，食后空心，日进二服。
治香港脚，脚上生风毒疮肿，疼痛。
漏芦 白蔹 槐白皮 五加皮 甘草（各七钱半） 蒺藜子（二两）
上为 咀，每服五两，水一斗，煮取六升，去滓。看冷热，于无风处，淋洗之。
毡矾散 治脚烂疮。
竹蛀屑 毡烧灰 红枣（烧存性） 黄丹 白矾（枯） 韶粉
各等分。为细末掺之。
龙骨散 治脚疽，并久远恶疮，他药无效者。
白龙骨（二钱半，研） 轻粉（二钱半） 槟榔（一钱，研） 猪粪（不以多少，新瓦上焙干，入火
中烧令红，取出存性，研为细末，五钱）
上研令匀，先以口含 水或温盐汤，洗令疮净见肉。却以真麻油调药，随疮大小敷
之。未愈再敷，三五日可。
The Kidney governs the feet. If Kidney deficiency occurs and the Kidney is attacked by Wind-Dampness, which assaults the feet and knees, it is named Hong Kong Jiao (a disease characterized by swelling and weakness of the lower legs and feet). Due to the stagnation of Qi and Blood, and the abundance of Damp-Toxic Qi trapped in the skin and interstices without being able to diffuse and circulate freely, sores arise on the feet. If Wind-Toxin does not dissipate, it combines with the sores, causing them to gradually increase, presenting with yellow exudate, edema, pain, high fever, and difficulty in healing over a long period.
Xijiao San (Rhinoceros Horn Powder): Treats Hong Kong Jiao caused by Wind-Toxin, resulting in painful and swollen sores, and mental restlessness with heat.
Ingredients: Xi Jiao Xie (Rhinoceri Cornu, sliced), Tian Ma (Gastrodiae Rhizoma), Qiang Huo (Notopterygii Rhizoma et Radix, radix removed), Zhi Ke (Aurantii Fructus, stir-fried with bran, albedo removed), Fang Feng (Saposhnikoviae Radix), Huang Qi (Astragali Radix, radix removed), Bai Ji Li (Tribuli Fructus), Huang Qin (Scutellariae Radix), Bai Xian Pi (Dictamni Cortex, each 7.5 qian), Bing Lang (Arecae Semen, 1 liang), Gan Cao (Liquiritiae Radix, honey-fried, 0.5 liang), Wu She (Zaocys, soaked in wine, 2 liang).
Preparation and Administration: Coarsely crush the herbs. Take 8 qian per dose, add 1.5 zhong zhan of water and 5 slices of Sheng Jiang (Zingiberis Rhizoma Recens), decoct until 1 da zhan remains. Strain and take warm, at any time.
Loulu Wan (Euphrasiae Pill): Treats severe swelling and sores in Hong Kong Jiao that persist for a long time, with continuous flow of pus and blood accompanied by pain.
Ingredients: Lou Lu (Euphorbiae Humifusae Herba), Qin Jiao (Gentianae Macrophyllae Radix, each radix removed), Wei Rui (Polygonati Odorati Rhizoma), Zhi Ke (Aurantii Fructus, albedo removed, stir-fried with bran), Bing Lang (Arecae Semen), Chuan Da Huang (Rhei Radix et Rhizoma, each 1 liang), Fang Feng (Saposhnikoviae Radix), Du Huo (Angelicae Pubescentis Radix), Huang Qi (Astragali Radix, each radix removed), Huang Qin (Scutellariae Radix), Wu Jia Pi (Acanthopanacis Cortex), Chi Shao Yao (Paeoniae Radix Rubra, each 7.5 qian), Wu She (Zaocys, soaked in wine, 2 liang).
Preparation and Administration: Grind into fine powder. Mix with refined honey, pound 200-300 times, and form pills the size of wu zi (wu-tzu seeds). Take 30-40 pills per dose, washed down with warm wine, at any time.
Lurong Wan (Deer Antler Pill): Treats Hong Kong Jiao with sores arising on the ankle.
Ingredients: Lu Rong (Cervi Cornu Degelatinatum, roasted with butter, pounded separately into paste), Wu Wei Zi (Schisandrae Fructus), Dang Gui (Angelicae Sinensis Radix, radix removed; these two are made into powder), Shu Di Huang (Rehmanniae Radix Praeparata, pounded into paste).
Preparation and Administration: Equal parts of the above ingredients. Mix with wine paste to form pills the size of wu zi. Take 30-40 pills per dose before meals, washed down with warm wine or salted water. Follow with the subsequent prescription.
Another Prescription:
Chuan Xiong (Ligustici Chuanxiong Rhizoma), Dang Gui (Angelicae Sinensis Radix, radix removed, equal parts).
Preparation and Administration: Grind into fine powder. Take 2-3 qian per dose, mix with Jing Jie Tang (Schizonepetae Spica Decoction) and swallow, after meals on an empty stomach, twice daily.
Treats Hong Kong Jiao with Wind-Toxin sores and swelling on the feet, accompanied by pain.
Ingredients: Lou Lu (Euphorbiae Humifusae Herba), Bai Lian (Bupleuri Radix), Huai Bai Pi (Morus Albae Cortex), Wu Jia Pi (Acanthopanacis Cortex), Gan Cao (Liquiritiae Radix, each 7.5 qian), Ji Li Zi (Tribuli Fructus, 2 liang).
Preparation and Administration: Coarsely crush the herbs. Take 5 liang per dose, add 1 dou of water, boil until 6 sheng remain. Strain. Wash the affected area with the liquid at a comfortable temperature in a windless place.
Zhan Fan San (Wool Alum Powder): Treats rotting sores on the feet.
Ingredients: Zhu Zhu Xie (Bamboo Borer Debris), Zhan Shao Hui (Burnt Wool Ash), Hong Zao (Jujubae Fructus, burnt to retain nature), Huang Dan (Minium), Bai Fan (Alumen, calcined), Shao Fen (Kaolin).
Preparation and Administration: Equal parts of the above ingredients. Grind into fine powder and sprinkle onto the lesion.
Long Gu San (Dragon Bone Powder): Treats jiu ju (foot gangrene) and chronic malignant sores unresponsive to other treatments.
Ingredients: Bai Long Gu (Fossilia Ossis Mastodi, 2.5 qian, ground), Qing Fen (Calomelas, 2.5 qian), Bing Lang (Arecae Semen, 1 qian, ground), Zhu Fen (Porci Faeces, amount unspecified, dried on new tile, burned red in fire, retained nature, ground into fine powder, 5 qian).
Preparation and Administration: Grind uniformly. First, rinse the sore clean until the flesh is visible using saliva or warm salt water. Then, mix the medicine with genuine sesame oil and apply according to the size of the sore. Reapply if not healed, once every three to five days.