此症又名风疳，生股上，延及两腿，缠绵不已，形如黍豆，色红作痒，甚则 赤肿痛。
初起用芫花、川椒、黄柏，煎水洗，即消。已破者，无论干湿，照疥疮各方治之。湿甚者，
照黄水疮（均见痈诸方）治之。久不愈者，马苋膏（用痈毒诸方）最效。或用白油膏（见腿
部）治
生股上者名臀尖，亦有生两旁者，色红肿照痈毒各方治之，色白者照阴疽各方治之。
在肛门、前阴根后两相交界之处。
又名骑马痈，生在海底，初起细粒，渐大如桃李，俗呼偷粪老鼠。溃烂之后，一经房事
走漏，即成漏生管，体弱者患之更危。诸漏宜医，独此难治，治则漏管愈大难救。未成脓时
，用生甘草、熟大黄各三钱，酒煎空心服，一剂即愈。如已成脓，服醒消丸即愈。倘患色白
者，服小金丹即愈。此林屋山人秘方也。
又方∶用横纹生甘草一两，截数断，用水泡透，文火烘干，再泡再烘，以中心水润为止
，切细，加当归一两，用酒煎服，日服一次，半月后方能消尽。
又方∶溃烂，久不收口、未生管者，用水仙膏（见痈毒通治门）敷之，百发百中。已生
管
此症始于受湿，以及酒色劳伤，外感风寒冒热，忽然手足发冷发热，其气从脚下而起，
上冲心腹作痛。或头痛身痛，或胀闷、或呕吐、或昏迷，或大便闭塞，或两足胫红肿，寒热
如伤寒状。从此，或一月一发，半月、数月一发，渐渐四肢挛缩转筋，脚膝肿大。此为香港脚
，非中风寒也。倘不知而误以伤寒中风治之，则为害不浅矣。
外治法∶白矾二两，地浆水十八碗，新杉木三、四片，煎六、七滚，用杉木桶（新者更
佳）盛一半浸脚，留一半徐徐添入，上用衣被围身，使略有微汗。洗完，随饮薄粥。如一
未愈，再洗二次，照前方加硫黄三钱，无不愈矣。取地浆水法∶于净土地上掘二三尺深，
新汲水倾入，搅浊，少俟澄定，取半清半浊者，吹去浮沫用之。
又方∶盐三斤，炒热，包裹痛处。并用一包以脚踏之，冷则随换，夜夜用之，以脚心热
透为度。加槐白皮同炒更妙。
又方∶用盐搽痛处，少时，用热水洗之。有人患香港脚，百药不效，后得此方除根。
又方∶旧砖烧红，以陈旧淘米水淬入，乘热布包三块，用膝夹住，棉被盖紧，冷则随换
三、五次即愈。
又方∶茅山苍术煎酒服，即可行动。
又方∶见后腰臀腿膝疼痛苍术散方。
这种病症又名风疳，生于大腿上部，蔓延至双腿，病程缠绵难愈。皮损形状像黍米或豆类，颜色发红且瘙痒，严重时会出现红肿疼痛。
初起时，可用芫花、川椒、黄柏煎汤外洗，即可消退。已经破溃的，无论干湿，参照治疗疥疮的各方案处理。湿邪严重者，参照治疗黄水疮（均见痈诸方）的方案处理。久治不愈者，使用马苋膏（用痈毒诸方）最为有效。或者使用白油膏（见腿部）治疗。
生长在大腿根部上方者名为臀尖，也有生长在两旁者，若色红肿痛，参照治疗痈毒的各方案处理；若颜色发白，参照治疗阴疽的各方案处理。
此症位于肛门与前阴根后两者交界之处。
又名骑马痈，生于会阴部（海底），初起为细小颗粒，逐渐增大如桃李大小，俗称“偷粪老鼠”。溃烂之后，若行房事导致精气走漏，即形成瘘管，体质虚弱者患病更为危险。各种瘘管宜早医治，唯独此症难以治愈，一旦治疗，瘘管越大越难挽救。在脓未形成时，用生甘草、熟大黄各三钱，酒煎后空腹服用，一剂即可痊愈。如果脓已形成，服用醒消丸即可痊愈。若患处颜色发白，服用小金丹即可痊愈。这是林屋山人的秘方。
又一方：用横纹生甘草一两，截成数段，用水浸泡透彻，用文火烘干，再泡再烘，直到中心仍有水润为止，切碎，加入当归一两，用酒煎服，每日一次，半月后才能完全消散。
又一方：对于溃烂、久不收口、尚未形成瘘管者，敷用水仙膏（见痈毒通治门），效果极佳。已生成瘘管者……
此症始于感受湿邪，以及酒色过度、劳倦损伤，外加风寒冒热，突然手足发冷发热，气从脚下而起，上冲心腹引起疼痛。或头痛身痛，或胀闷、呕吐、昏迷，或大便闭塞，或两小腿红肿，寒热症状如同伤寒。从此，或一月发作一次，或半月、数月发作一次，渐渐四肢挛缩转筋，脚膝肿大。这称为香港脚（痛风/足部肿痛），并非中风寒所致。如果不知道而误用治疗伤寒中风的办法，危害就不浅了。
外治法：白矾二两，地浆水十八碗，新杉木三四片，煎煮六七滚，用杉木桶（新的更好）盛一半浸脚，留一半徐徐添入，上面用衣被围住身体，使略有微汗。洗完，随即喝薄粥。如果一次未愈，再洗两次，照前方加硫黄三钱，无不痊愈的。取地浆水的方法：在干净土地上挖掘二三尺深，倒入新汲水，搅浑，稍待澄清，取半清半浊的部分，吹去浮沫使用。
又一方：盐三斤，炒热，包裹疼痛处。并用一包以脚踏之，冷则随时更换，每晚使用，以脚心热透为度。加槐白皮同炒更妙。
又一方：用盐搽涂疼痛处，片刻后，用热水清洗。有人患香港脚，百药无效，后来得到此方除根。
又一方：旧砖烧红，用陈旧淘米水淬火，趁热用布包三块，用膝盖夹住，棉被盖紧，冷则随时更换，三五次即可痊愈。
又一方：茅山苍术煎酒服用，即可行动。
又一方：见后腰臀腿膝疼痛苍术散方。
This condition is also known as Feng Gan (Wind Chancre), occurring on the upper thighs and extending to both legs, with a lingering course. The lesions resemble millet or beans, are red in color and itchy, and in severe cases present with redness, swelling, and pain.
At the initial stage, wash with a decoction of Genkwa Flos (Yuanhua), Zanthoxylum Pericarpium (Chuanjiao), and Phellodendri Cortex (Huangbo), which will cause the lesions to subside. For those already ulcerated, regardless of whether they are dry or wet, treat according to the various formulas for Scabies (Jie Chuang). If dampness is severe, treat according to the formulas for Yellow Water Blister (Huangshui Chuang) (see all formulas for Carbuncles). For chronic non-healing cases, Muxian Gao (Purslane Ointment) (see formulas for Toxic Carbuncles) is most effective. Alternatively, use Baiyou Gao (White Oil Ointment) (see Lower Limbs).
Those arising on the upper part of the thigh are called Tunjian (Buttock Tip); some arise on the sides. If red and swollen, treat according to the various formulas for Carbuncles; if white in color, treat according to the formulas for Yin Abscesses (Yin Ju).
This condition occurs at the junction behind the anus and the root of the external genitalia.
It is also known as Qima Yong (Riding Carbuncle), arising in the Haidi (Perineum). Initially appearing as fine granules, it gradually enlarges to the size of plums or peaches, commonly referred to as "Stealing Feces Mouse." After ulceration, if sexual intercourse leads to seminal leakage, fistulas may form. It is more dangerous for those with weak constitutions. While various fistulas should be treated medically, this one is particularly difficult to cure; the larger the fistula becomes during treatment, the harder it is to save the patient. Before suppuration, take 3 qian of Raw Glycyrrhizae Radix et Rhizoma (Sheng Gancao) and 3 qian of Cooked Rheis Radix et Rhizoma (Shu Dahuang), decocted in wine, taken on an empty stomach. One dose results in a cure. If suppuration has occurred, taking Xingxiao Wan (Revive and Eliminate Pill) results in a cure. If the lesion is pale in color, taking Xiaojin Dan (Little Gold Pill) results in a cure. This is a secret formula from Linwu Shanshanren.
Another prescription: Use 1 liang of Raw Glycyrrhizae Radix et Rhizoma (Sheng Gancao) with transverse striations, cut into segments, soak thoroughly in water, dry over gentle heat, then soak again and dry again until the center remains moist. Cut finely, add 1 liang of Angelicae Sinensis Radix (Danggui), decoct in wine, and take once daily. Complete resolution takes half a month.
Another prescription: For ulcers that have not healed for a long time and have not yet formed fistulas, apply Shuixian Gao (Narcissus Ointment) (see General Treatment of Toxic Carbuncles); it is highly effective. For those who have already formed fistulas...
This condition originates from dampness exposure, excessive alcohol and sexual activity, labor injury, and external contraction of wind-cold combined with heat. Suddenly, the hands and feet become cold and hot, with qi rising from the feet upwards to the heart and abdomen causing pain. There may be headache and body ache, distension and stuffiness, vomiting, coma, constipation, or redness and swelling of the lower legs, with chills and fever resembling Taiyang disease (Shanghan). From then on, it may occur once a month, every half month, or every few months, gradually leading to limb spasms and convulsions, and swelling of the feet and knees. This is Hongxiang Jiao (Hong Kong Foot/Gouty Arthritis), not caused by wind-cold stroke. If misdiagnosed and treated as Shanghan or Zhongfeng, the harm would be significant.
External treatment method: Take 2 liang of Alum (Baifan), 18 bowls of Earth Slurry Water (Dijiang Shui), and 3-4 pieces of new Fir Wood (Xin Shanmu). Boil for six or seven rolls. Place half in a Fir Wood Bucket (new ones are better) to soak the feet, and slowly add the remaining half. Cover the body with clothes and blankets to induce slight sweating. After washing, drink thin porridge immediately. If not cured after one session, wash twice more, adding 3 qian of Sulfur (Liu Huang) to the previous prescription. All cases will be cured. Method to obtain Earth Slurry Water: Dig two or three chi deep in clean soil, pour in freshly drawn water, stir until turbid, let settle briefly, take the semi-clear semi-turbid portion, blow away floating foam, and use.
Another prescription: Stir-fry 3 jin of Salt until hot, wrap it, and apply to the painful area. Also, step on another wrapped pack with the foot, replacing it when cool. Use nightly until heat penetrates the sole of the foot. Adding Phellodendri Amurensis Cortex (Huai Baipi) for stir-frying is even better.
Another prescription: Rub salt on the painful area, wait a moment, then wash with hot water. Someone suffered from Hongxiang Jiao, unresponsive to hundreds of medicines, but was cured of its root after obtaining this prescription.
Another prescription: Red-hot old bricks are quenched in aged rice-washing water. Wrap three bricks in cloth while hot, clamp between the knees, cover tightly with a cotton quilt, and replace when cool. Three to five times result in a cure.
Another prescription: Decoct Conger Japonicus Rhizoma (Caoshu) from Maoshan in wine and take orally to restore mobility.
Another prescription: See the Caoshu San Formula for Pain in the Lower Back, Buttocks, Legs, and Knees below.