（附论）
夫干癣但有棱廓。皮肤枯痒。搔之白屑出是也。皆是风湿邪气。客于腠理。复值寒湿与
血
方
黄连散 治干癣搔之白屑起。亦治疥。
黄连（一两去须） 藜芦（半两去芦头） 川倭黄（一两） 干姜（半两生锉） 茹
（一两） 莽
先以新布拭癣令伤
胡粉散 治干癣痒不止。
胡粉 黄连（去须） 蛇床子 白蔹（以上各半两） 上为细末。以面脂调涂干者。湿
即贴之。
干癣方
野狼毒 草乌头（各三钱半） 斑蝥（七枚去翅足） 上生用为末。津唾调敷。用竹篾子
刮破涂药
又方 治干癣痒痛不止。
斑蝥（五月五日取十枚） 麝香（一钱半） 上研为末。以醋调。涂在疮上。出多黄水
瘥。
又方
川乌头（三枚生用） 干蝎（五枚） 上为末面。油调作膏。涂之。
一抹散 治干癣不瘥。
天南星 草乌头（各一枚生用） 上为细散。用羊蹄根捣绞自然汁调涂。不过三上瘥。
治干癣积年生痂。搔之黄水出。每逢阴雨即痒。
巴豆（十枚肥者） 上于炭上烧之。令油出尽。即于乳钵内。以少许酥和研膏。涂之。
不过一
又方
取青葙子末以口脂调。先用浆水净洗后。敷之。
又方
取槲树白皮涂之。
治干癣久不瘥。出黄水不止。阴雨之时即痒痛。
用斑蝥半两。微炒为末。蜜调敷之。
治干癣积年生痂。搔之黄水出。每逢阴雨即痒。
用野狼毒末涂之。
【附论】
所谓干癣，其特征仅是边缘清晰。皮肤干枯且瘙痒，搔抓后会有白色皮屑脱落。这全都是由于风湿邪气，侵袭停留在腠理（皮肤纹理与肌肉间隙），又恰逢寒湿之气……
黄连散：治疗干癣，搔抓后白色皮屑纷飞。也治疗疥疮。
药材：黄连（一两，去除须根）、藜芦（半两，去除芦头）、川大黄（一两）、干姜（半两，生切）、茹（一两）、莽草（原文此处似有缺漏或异体字，依上下文推测为莽草或类似祛风药，但严格按原文“莽”字保留，通常指莽草）。
用法：先用新布擦拭患处，使其轻微破损出血，再涂药。
胡粉散：治疗干癣瘙痒不止。
药材：胡粉、黄连（去除须根）、蛇床子、白蔹（以上各半两）。
用法：将上述药材研成细末。用面脂调和，干燥者涂抹，湿润者贴敷。
干癣方：
药材：野狼毒、草乌头（各三钱半）、斑蝥（七枚，去除翅膀和足）。
用法：生用，研成粉末。用唾液调和后敷于患处。用竹篾刮破皮肤后再涂药。
又一方：治疗干癣瘙痒疼痛不止。
药材：斑蝥（五月五日采集十枚）、麝香（一钱半）。
用法：研成粉末，用醋调和，涂在疮口上。待流出大量黄水后即可痊愈。
又一方：
药材：川乌头（三枚，生用）、干蝎（五枚）。
用法：研成粉末，用面粉和水调制成膏状，涂抹患处。
一抹散：治疗干癣久治不愈。
药材：天南星、草乌头（各一枚，生用）。
用法：研成细散。用羊蹄根捣碎绞取自然汁液调和后涂抹。不超过三次即可痊愈。
治干癣积年生痂，搔抓后流出黄水，每逢阴雨天即瘙痒。
药材：巴豆（十枚肥大的）。
用法：在炭火上烧制，直到油完全渗出。然后在乳钵中，加入少许酥油研磨成膏状，涂抹患处。不超过一次……（原文此处截断）
又一方：
取青葙子粉末，用口脂（唇膏或油脂类介质）调和。先用浆水洗净患处，然后敷药。
又一方：
取槲树的白皮涂抹患处。
[Attached Discussion]
The so-called Gan Xuan (Dry Lichen/Scabies-like condition) is characterized solely by distinct margins. The skin is dry and itchy, and scratching yields white scales. This is entirely due to Wind-Damp pathogenic factors lodging in the Cou Li (interstices of skin and muscles), compounded by Cold-Dampness...
Huanglian San (Coptis Powder): Treats Gan Xuan where scratching causes white scales to rise. Also treats Jie (Scabies).
Ingredients: Huanglian (Coptidis Rhizoma, 1 liang, remove roots), Lilu (Veratri Rhizoma, 0.5 liang, remove rhizome base), Chuan Huangqi (Rhei Radix et Rhizoma, 1 liang), Ganjiang (Zingiberis Rhizoma, 0.5 liang, raw and sliced), Ru (likely referring to a specific herb, kept as 'Ru'), Mangcao (Arisaematis Cum Bile or similar, kept as 'Mang' per text).
Usage: First wipe the lesion with a new cloth until slightly injured, then apply medicine.
Hufen San (Lead Carbonate Powder): Treats Gan Xuan with unceasing itching.
Ingredients: Hufen (Galena/Lead Carbonate), Huanglian (Coptidis Rhizoma, remove roots), Shechuangzi (Cnidii Fructus), Bailian (Paeoniae Radix Alba) (each 0.5 liang).
Usage: Grind the above into fine powder. Mix with Mianzhi (face fat/lard) for application; apply topically if dry, or use as a plaster if wet.
Formula for Gan Xuan:
Ingredients: Yelangdu (Stellerae Radix), Caowutou (Aconiti Kusnezoffii Radix) (each 3 qian), Banmao (Mylabris, 7 pieces, remove wings and feet).
Usage: Use raw, grind into powder. Mix with saliva and apply. Scrape the skin with a bamboo splint before applying medicine.
Another Formula: Treats Gan Xuan with unceasing itching and pain.
Ingredients: Banmao (Mylabris, 10 pieces collected on the 5th day of the 5th lunar month), Shexiang (Moschus, 1.5 qian).
Usage: Grind into powder, mix with vinegar, and apply to the sore. Cure is achieved when copious yellow fluid discharges.
Another Formula:
Ingredients: Chuan Wutou (Aconiti Radix, 3 pieces, raw), Ganxie (Scorpio, 5 pieces).
Usage: Grind into powder, mix with flour paste to form an ointment, and apply.
Yimo San (One-Wipe Powder): Treats Gan Xuan that does not heal.
Ingredients: Tiannanxing (Arisaematis Cum Bile), Caowutou (Aconiti Kusnezoffii Radix) (each 1 piece, raw).
Usage: Grind into fine powder. Mix with natural juice extracted from crushing Yangti Gen (Radix Salsolae Coronopifoliae) and apply. It will heal within no more than three applications.
Treats Gan Xuan with crusts formed over years, discharging yellow fluid upon scratching, and itching during rainy weather.
Ingredients: Badou (Crotonis Fructus, 10 plump pieces).
Usage: Roast over charcoal until all oil is expressed. Then, in a mortar, mix with a small amount of Su (butter/ghee) and grind into an ointment. Apply. No more than one... [Text cuts off]
Another Formula:
Take Qingxiangzi (Phytolaccae Semen) powder, mix with Kouzhi (lip balm/fat). First wash the area cleanly with Jiangshui (fermented grain water), then apply.
Another Formula:
Apply the white bark of Hu Tree (Quercus variabilis).
Treats Gan Xuan that has not healed for a long time, with continuous discharge of yellow fluid, and itching/pain during rainy weather.
Usage: Take 0.5 liang of Banmao (Mylabris), lightly stir-fry, grind into powder, mix with honey, and apply.
Treats Gan Xuan with crusts formed over years, discharging yellow fluid upon scratching, and itching during rainy weather.
Usage: Apply powder of Yelangdu (Stellerae Radix).