《病源论》云∶人皮肤虚，为风寒所折，则起隐疹。寒多则色赤，风多则色白，甚者痒
痛，
《葛氏方》卒得风搔隐疹，搔之生疮汁出。初痒后痛，烦闷不可勘方∶
烧石令赤，以少水中，纳盐数合，及热的以洗渍之。
又方∶锉桑皮二斗许，煮令浓及热，以自洗浴。
又方∶以盐汤洗之， （大廉反）菜涂之。
又方∶以慎火合豉，捣以敷之。
《医门方》云∶煮蒴 汤和少酒以浴之，极佳。
《刘涓子》方治耳体隐疹发疮方∶
地榆根（三两） 黄连（二两） 大黄（四两） 黄芩（四两） 苦参（八两） 甘草
（六两） 芎 （
上七物，以水六升，煮取三升半，浴洗。
《孟诜食经》云∶拧茎单煮，洗浴之。
又方∶茺蔚可作浴汤。
又方∶煮赤小豆取汁，停冷洗，不过三四。
又方∶捣蘩蒌，封上。
《病源论》云∶凡癞病，皆是恶风及犯触忌害得之。初觉皮肤不仁，或淫淫苦痒如虫行；
或
最
又有乌癞、白癞，论诸癞（诸癞，或本无此字）形状在本书依繁不载。
又云∶酒醉露卧，不幸生癞。
《录验方》云∶有人五癞八风之法∶一木癞、二石癞、三风癞、四水癞、五沸癞。
《葛氏方》云∶癞病乃有八种云云。
治白癞乌癞方∶
苦参根皮干之粗捣，以好酒三斗，渍二十一日，去滓，服三合，日三。
又方∶干艾叶随多少，浓煮以渍面及饭酿如常法，酒熟随意饮，恒使熏。
又方∶取马薪蒿，一名马矢蒿，一名烂石草，捣末，末服方寸匕。日三，百日更赤起，
一年
又方∶捣好雌黄末，苦酒和，鸡羽染以涂疮上，干复涂之。
《僧深方》治癞方∶
水中荷浓煮以自渍半日，用此方多愈。
又方∶水中浮青萍浓煮，自渍之。
《范汪方》治大风癞疮方∶
取 （音律）草一担，二石水，煮取一石汁，以渍疮，不过三渍愈。
《集要方》治癞方∶
留黄，苦酒和涂之。
According to *Zhu Bing Yuan Hou Lun* (Treatise on the Pathogenesis and Manifestations of All Diseases), when human skin is deficient, it is invaded by wind-cold pathogens, resulting in *yin zhen* (hidden urticaria/rash). If cold predominates, the rash appears red; if wind predominates, it appears white. In severe cases, itching and pain occur.
*Ge Shi Fang* (Formulas by Ge Hong) records: Sudden contraction of wind while scratching hidden urticaria can cause sores to form with exudate. It begins with itching and progresses to pain, accompanied by unbearable restlessness. Prescription: Heat a stone until red-hot, quench it in a small amount of water, add several *he* (a unit of volume) of salt, and wash/soak the affected area while hot.
Another prescription: Chop approximately two *dou* of mulberry bark, boil until thick and hot, and use for bathing.
Another prescription: Wash the affected area with salt water, then apply *li* (Chenopodium album) leaves.
Another prescription: Mash *shen huo* (Artemisia argyi or similar herb) with fermented soybeans (*chi*) and apply as a poultice.
*Yi Men Fang* (Medical Gate Formulas) states: Bathing with decoction of *shuo* (Achyranthes bidentata) mixed with a little wine yields excellent results.
*Liu Juanzi Gui Yi Fang* (Liu Juanzi's Ghost Remnant Formulas) treats ear and body hidden urticaria with sores using the following formula:
Radix Sanguisorbae (3 liang), Rhizoma Coptidis (2 liang), Radix et Rhizoma Rhei (4 liang), Cortex Phellodendri (4 liang), Radix Sophorae Flavescentis (8 liang), Radix Glycyrrhizae (6 liang), Radix Chuanxiong (dosage omitted in source).
Boil these seven ingredients in six *sheng* of water until reduced to three and a half *sheng*, and use for washing/bathing.
*Meng Shen Shi Jing* (Dietary Classic by Meng Shen) states: Boil stems of *ning* (likely Tribulus terrestris stem) alone and use for bathing.
Another prescription: *Chongwei* (Herba Leonuri Japonici) can be boiled into a bath solution.
Another prescription: Boil Adzuki beans, take the juice, let it cool, and wash with it. No more than three to four times are needed.
Another prescription: Mash *fan lou* (likely a type of plant, possibly related to *Fritillaria* or local herb) and apply as a compress.
*Zhu Bing Yuan Hou Lun* states: All forms of *lai* disease (leprosy-like chronic dermatoses) arise from evil wind pathogens and violation of taboos. Initially, one may feel numbness in the skin, or intense itching like insects crawling. There are also black *lai* and white *lai*. The descriptions of various *lai* conditions are not detailed in this book due to their complexity.
It further states: Sleeping outdoors while intoxicated may unfortunately lead to *lai* disease.
*Lu Yan Fang* (Verified Formulas) mentions methods for five types of *lai* and eight types of wind: 1. Wood *lai*, 2. Stone *lai*, 3. Wind *lai*, 4. Water *lai*, 5. Boiling *lai*.
*Ge Shi Fang* states that there are eight types of *lai* disease, etc.
Prescription for treating White *Lai* and Black *Lai*:
Dry the root bark of Sophorae Flavescentis, coarsely crush it, soak in three *dou* of good wine for twenty-one days, strain, and drink three *he* per dose, three times daily.
Another prescription: Use an appropriate amount of dried Folium Artemisiae Argyi, boil strongly, use the steam to fumigate the face, and brew rice wine in the usual manner. Drink the wine freely once ready, ensuring regular fumigation.
Another prescription: Take Ma Xin Hao (also known as Ma Shi Hao or Lan Shi Cao, likely Artemisia capillaris or similar), grind into powder, and take one *cun bi* (square-inch spoonful) per dose. Three times daily. After one hundred days, the complexion may become ruddier; after one year... [text incomplete].
Another prescription: Grind high-quality Realgar (Orpiment) into powder, mix with vinegar, and apply to the sores using chicken feathers. Reapply when dry.
*Seng Shen Fang* (Monk Shen's Formulas) for treating *Lai*:
Boil lotus (He) found in water strongly, and soak the body in it for half a day. This formula cures most cases.
Another prescription: Boil floating duckweed (Qing Ping) found in water strongly, and soak the affected areas.
*Fan Wang Fang* (Fan Wang's Formulas) for treating severe wind-induced *Lai* sores:
Take one dan of Lv Cao (likely a specific medicinal grass, pronunciation 'lv'), boil in two *shi* of water until reduced to one *shi* of juice. Soak the sores in it. Healing occurs within no more than three soaks.
*Ji Yao Fang* (Essential Formulas Collection) for treating *Lai*:
Sulfur, mixed with vinegar, applied topically.