脓窠疮，乃肺经有热，脾经有湿，二气交感，其患先从小泡作痒，后变脓泡作疼，所成脓窠疮也。甚者清
热散风，凉血除湿治之，凉血清风散是也。外以蛇床子散或诸疮一扫光搽之亦效。兼戒口味自愈。
蛇床子散
蛇床子散用黄丹 轻粉枯矾枫肉良
大黄不少松香末 麻油调许治脓疮
治脓窠疮生于手足遍身，根硬作胀，痒痛非常。
蛇床子 大枫子（肉） 松香 枯矾（各一两） 黄丹 大黄（各五钱） 轻粉（三钱）
上为细末，麻油调搽，湿烂者干掺之。
脓窠又方
脓窠方中用石膏 黄柏黄丹轻粉饶
还有枯矾能燥湿 搽之痛痒实时逃
黄柏（一两，以公猪胆汁搽之，火上炙，三钱） 石膏（ ，一两） 轻粉（二钱） 黄丹 枯矾（各三钱）
上为末，麻油调搽，湿者干掺。
冻风者，肌肉寒极、气血不行，谓肌死患也。初起紫斑，久则变黑、腐烂作脓者，以碧玉膏主之，生肌敛口。
碧玉膏（见结毒门）
治冻风皮肉损烂，脓水淋漓，疼痛不止者用之。
独胜膏
独胜膏来最散寒 冻风冻耳一般安
六月每逢三六日 搽之冬冻不相干
治冻风冻跟、冻耳，每逢冬寒则发。
六月初六、十六、二十六日，用独蒜捣膏，日中晒热，在于遇冬所发之处擦之，忌下汤水，一日共擦三次
不发。又每常冻风用茄根同葱汤浸洗，再不重发。
Nongke Chuang (Crusted Pustules) is caused by heat in the Lung Meridian (Lung Channel) and dampness in the Spleen Meridian (Spleen Channel), where these two pathogenic factors interact. The condition initially presents as small blisters accompanied by itching, which then transform into pustules causing pain, thereby forming Nongke Chuang. In severe cases, treatment should employ methods to clear heat and disperse wind, cool blood and remove dampness, using Liangxue Qingfeng San (Cool Blood and Disperse Wind Powder). Externally, Shechuangzi San (Cnidium Seed Powder) or Zhuchuang Yisaoguang (All Sores One-Wipe Light) can be applied with efficacy. Dietary restrictions are also required for spontaneous recovery.
Shechuangzi San
Shechuangzi San utilizes Huangdan (Lead Monoxide), Qingfen (Calomel), Kufan (Alum), and Dafengzi Rou (Seed of *Aleurites fordii*), along with a substantial amount of Dahuang (Rhubarb Root and Rhizome) and Songxiang Mo (Pine Rosin Powder). Mixed with a small amount of Mayou (Sesame Oil), it treats pustular sores.
This formula treats Nongke Chuang occurring on the hands, feet, and entire body, characterized by hard roots, swelling, and intense itching and pain.
Herbs: Shechuangzi (Fructus Cnidii), Dafengzi Rou (Seed of *Aleurites fordii*), Songxiang (Pine Rosin), Kufan (Alumen) (each 1 liang); Huangdan (Lithargyrum), Dahuang (Radix et Rhizoma Rhei) (each 5 qian); Qingfen (Calomel) (3 qian).
Grind all herbs into fine powder. Mix with sesame oil for external application; if the lesion is wet and ulcerated, apply the dry powder directly.
Another Formula for Nongke Chuang
This formula for Nongke Chuang uses Shigao (Gypsum Fibrosum), Huangbai (Phellodendri Cortex), Huangdan, and Qingfen in generous amounts. Additionally, Kufan helps to dry dampness; upon application, pain and itching quickly subside.
Herbs: Huangbai (Phellodendri Cortex) (1 liang, rubbed with bile from a male pig and roasted over fire, use 3 qian); Shigao (Gypsum Fibrosum) (1 liang); Qingfen (Calomel) (2 qian); Huangdan, Kufan (each 3 qian).
Grind into powder. Mix with sesame oil for application; if wet, apply dry powder.
Liangxue Xiaofeng San (Cool Blood and Eliminate Wind Powder) and Zhuchuang Yisaoguang (see section on Scabies).
Dongfeng (Frostbite/Cold Wind Injury) refers to extreme cold in the muscles and stagnation of Qi and Blood, termed "Muscle Death." It initially presents as purple spots, which later turn black, rot, and suppurate. Biyu Gao (Jade Green Ointment) is the primary treatment to promote tissue regeneration and close wounds.
Biyu Gao (see section on Chancre).
Used to treat skin and muscle damage and ulceration due to Dongfeng, with continuous discharge of pus and unceasing pain.
Dusheng Gao
Dusheng Gao has potent warming and cold-dispersing properties, providing relief for both frostbite and chilblains on the ears.
Apply during the days ending in six in the sixth lunar month (6th, 16th, 26th). Rubbing this ointment prevents winter frostbite.
Treats frostbite on heels and ears, which flares up during winter cold.
Method: On the 6th, 16th, and 26th days of the sixth lunar month, crush a single clove of garlic into a paste, heat it in the sun at noon, and rub it onto areas prone to frostbite in winter. Avoid contact with water. Apply three times a day to prevent recurrence. Additionally, for chronic frostbite, soak the affected area in a decoction of Qiegen (Eggplant Stem) and Congbai (Scallion White) to prevent reoccurrence.