许仁则曰∶此病有数种，有饮气下流以成香港脚饮气即水气之渐。亦有肾气先虚，暑月承
热，以冷水洗脚，湿气不散，亦成香港脚，亦有肾气既虚，诸事不节，因居卑湿，湿气上冲，
亦成
香港脚
背满
物，
味汤
小腹
服之
吴茱萸（二两） 生姜（五两） 橘皮（三两） 桂心（二两） 大槟榔（十枚）
上药切。以水七升，煮取二升半，去滓，分温三服，服相去如人行七八里久，一服觉诸
状可，欲重合服亦佳。服汤后，将息经三四日，即服后桑根白皮等十味丸。忌生葱。
又方
桑根白皮（五两） 生姜（屑六两） 蜀椒（汗） 桂心 升麻（四两） 五味子（四
两）
上药捣筛，蜜和为丸，以饮下之，初服十五丸，日再服，稍稍加至三十丸，如梧子大。
觉热，食前服；觉冷，食后服之。
忌同。（蜀椒桂心元未见分两）
又至九月以后，宜合侧子等十味酒服之，兼将下丸方。
侧子（五两） 生姜（八两） 桑根白皮（八两） 桂心（四两） 白术（八两） 五
加白皮（
六两） 丹参（六两） 续断（五两） 牛膝（五两） 细辛（四两）
上药切，绢袋盛，用无灰酒五升，浸五六日，初服一鸡子黄许，日再服，稍稍加之，
以知为
同并出
Xu Renze said: This disease has several types. Some cases arise from the downward flow of fluid-retaining qi, leading to Hongjiaojiao (Hongjiaojiao, a condition characterized by swelling and pain in the lower limbs, often associated with edema). Other cases occur when kidney qi is initially deficient; during the hot summer months, washing feet with cold water prevents dampness from dissipating, also resulting in Hongjiaojiao. Still other cases happen when kidney qi is already deficient, daily activities are not regulated, and one resides in low-lying, damp places, causing dampness to rush upward, which also leads to Hongjiaojiao.
[Text fragment indicating symptoms or treatment intent: Back fullness, abdominal discomfort treated by decoction.]
Evodiae Fructus (Wuzhuyu, 2 liang), Zingiberis Rhizoma Recens (Shengjiang, 5 liang), Citri Reticulatae Pericarpium (Jupi, 3 liang), Cinnamomi Cortex (Guixin, 2 liang), Arecae Semen (Dabinglang, 10 pieces).
Cut the above herbs. Boil in 7 sheng of water until reduced to 2.5 sheng. Strain out the dregs. Divide into three warm doses. The interval between doses should be approximately the time it takes for a person to walk seven or eight li. If symptoms improve after one dose, taking another dose is acceptable. After taking the decoction, observe dietary and lifestyle restrictions for three to four days, then take the following pill made from ten ingredients including Morus Radix Cortex (Sangbaipi). Avoid raw green onions.
Another prescription:
Morus Radix Cortex (Sangbaipi, 5 liang), Zingiberis Rhizoma Recens (Shengjiang, cut into flakes, 6 liang), Zanthoxyli Fructus (Shujiao, processed to remove oil/sweat), Cinnamomi Cortex (Guixin), Cimicifugae Rhizoma (Shengma, 4 liang), Schisandrae Fructus (Wuweizi, 4 liang).
Pound and sieve the above herbs. Mix with honey to form pills. Swallow with water. Initially take 15 pills, twice daily. Gradually increase the dosage to 30 pills. The pills should be sized like Sophora japonica seeds (Wutongzi). If feeling heat, take before meals; if feeling cold, take after meals.
Dietary restrictions are the same as above. (Note: The dosages for Shujiao and Guixin were not originally specified.)
Furthermore, after September, it is appropriate to prepare a medicinal wine using Fuzi Lateralis Radix Preparata (Cezi) and nine other ingredients, taken concurrently with the following pill formula.
Fuzi Lateralis Radix Preparata (Cezi, 5 liang), Zingiberis Rhizoma Recens (Shengjiang, 8 liang), Morus Radix Cortex (Sangbaipi, 8 liang), Cinnamomi Cortex (Guixin, 4 liang), Atractylodis Macrocephalae Rhizoma (Baizhu, 8 liang), Acanthopanacis Cortex (Wujiapi, 6 liang), Salviae Miltiorrhizae Radix et Rhizoma (Danshen, 6 liang), Dipsaci Radix (Xuduan, 5 liang), Achyranthis Bidentatae Radix (Niuxi, 5 liang), Asari Radix et Rhizoma (Xixin, 4 liang).
Cut the above herbs and place them in a silk bag. Soak in 5 sheng of unadulterated wine for five to six days. Initially take an amount equivalent to the yolk of one chicken egg, twice daily. Gradually increase the dosage until therapeutic effects are observed.
All the above content comes from the same source.