《病源论》云∶ 疮者，由肤腠虚，风湿之气，折于血气，结聚所生。多着手足间，匝
匝相对，如新生茱萸子。痛痒抓搔成疮，黄汁出，浸淫生长，圻裂。时瘥时剧，变化生虫，
故名 疮。又有燥 、湿 候。
《葛氏方》∶治猝得 疮， 疮常对，在两脚及手足指，又随月生死方∶
以白犬血，涂之立愈。
又方∶以苦酒，和黄灰涂之。
又方∶捣桃叶，以苦酒和，疮上涂之。
又方∶煮苦酒，沸，以生韭一把纳中，熟出，以敷疮上，即愈。
又方∶乱发、头垢等分，蜗牛壳二七枚，合烧末，腊月猪膏和敷之。
《僧深方》治 方∶
取石上菖蒲，捣，猪膏和，敷疮，浓二分，先洗去痂。
又方∶灸疮上最良。
《千金方》∶凡一切 疮方∶
灸足大趾奇间二七壮。
又灸大指头亦佳。
又方∶酢一升，炒薤一把笃之。
又方∶炙 ，敷上。
又方∶炒腊月糖敷上。
又方∶烧故履系末敷之。
又方∶烧肥松取脂涂之。
又云∶燥 方∶酢和灰涂。
又方∶热牛屎涂之。
又云∶湿 方∶烧干虾蟆，猪脂和敷之。
《录验方》云∶芜菁子一升，熬，下筛，以绢裹之，辗转疮上，日三。
《广济方》疗 久不瘥方∶
取豉熬为末，以泔渍洗，干拭。又和麻油涂上，以故油衣裹三日，开。
The *Zhu Bing Yuan Hou Lun* (Treatise on the Pathogenesis and Manifestations of All Diseases) states: Chancre (sores/ulcers), arises from the deficiency of the skin and interstices, where wind-damp pathogens invade and obstruct the flow of Qi and Blood, leading to condensation and aggregation. It commonly occurs between the hands and feet, appearing symmetrically, resembling newly formed fruits of *Evodiae Fructus* (Wuzhuyu). Due to pain and itching, scratching creates sores that exude yellow fluid, spreading and eroding the skin, causing fissures. The condition fluctuates between remission and exacerbation, and may involve parasitic changes, hence named "Chancre" (Sore). There are also dry-type and damp-type manifestations.
*Ge Shi Fang*: For treating sudden onset of chancre (symmetrical blisters or erosions on extremities), which often appear in pairs on the feet and toes/fingers, and wax/wane with the lunar cycle:
Apply blood from a white dog to the affected area for immediate cure.
Another prescription: Apply yellow ash mixed with vinegar to the lesion.
Another prescription: Crush peach leaves, mix with vinegar, and apply to the sore.
Another prescription: Boil vinegar until bubbling, add a handful of raw garlic scapes (or leeks), cook thoroughly, remove, and apply as a poultice to the sore for instant healing.
Another prescription: Take equal parts of tangled hair and head dandruff, along with fourteen snail shells, burn them into powder, mix with lard rendered in the twelfth lunar month, and apply topically.
*Seng Shen Fang*: Treatment for chancre:
Take *Acori Tatarinowii Rhizoma* (Shichangpu) growing on rocks, crush it, mix with lard, and apply to the sore. The layer should be about two fen thick; first wash off the crusts.
Another prescription: Moxibustion directly on the sore is most effective.
*Qian Jin Fang*: Prescriptions for all types of chancre:
Moxibustion at Qijian (EX-LE5) on the big toe, seven applications (totaling fourteen moxa cones).
Moxibustion on the tip of the big toe is also beneficial.
Another prescription: One sheng of vinegar, stir-fry one handful of *Allium macrostemon Bulbus* (Xie) and crush it.
Another prescription: Roast [missing character] and apply topically.
Another prescription: Stir-fried sugar from the twelfth lunar month applied topically.
Another prescription: Burn old shoe straps into powder and apply.
Another prescription: Burn fat pine resin to extract oil and apply.
It is also stated: For dry-type chancre: Mix ash with vinegar and apply.
Another prescription: Apply hot cow dung.
It is also stated: For damp-type chancre: Burn dried toads, mix with lard, and apply.
*Lu Yan Fang* states: One sheng of *Brassica rapa var. trilocularis Seed* (Wujingzi), roasted and sifted, wrapped in silk cloth, rubbed back and forth over the sore three times daily.
*Guang Ji Fang*: For treating chronic chancre that does not heal:
Roast fermented soybeans (*Sojae Semen Praeparatum*, Chi Dou) into powder, soak and wash with rice water, then dry. Mix with sesame oil and apply, wrap with old oiled fabric for three days, then unwrap.