澄曰∶马蚁窝，乃无意脚 马蚁而成，或风湿结成，多生手足，形似蚁窝，俨如
针眼，奇痒入心，破流脂水。宜用穿山甲外敷，亦有手背手腕生者。
锡灰膏（陈楚阳。）治马蚁窝，血疯 疮，痒极不可忍者。
灰（筛取细者，二钱五分） 轻粉（一钱五分） 葱白（一根）
同生犍猪油去皮、膜捣膏，用刷子脚搽疮上，外以三退纸封之，三日全愈。
三退纸
蝉蜕 凤凰衣（各三钱） 密陀僧（六钱）
桐油八两熬成膏，以刷蘸膏，于连四纸上阴干，用时照疮大小剪贴，三日一换，换三次全愈。
如痒极搽锡灰膏收功。
又方
密陀僧（三钱） 百草霜 风化锻石（各五钱） 霉酒曲（一两五钱）
共为末，先以松毛须捣烂，煎汤先透，再用松毛须烧烟熏之，任其流水，拭干，再
以桐油调敷，频用桐油润之，每日一换，七日除根。
又方 大黄 研末桐油调敷。
又方 桐油篓盖包患处，数夜即效。
马蚁窝并痒极成片之疮。（吴越千。）
轻粉（二钱） 穿山甲（一两。新瓦上炙，剪成豆大，再用土炒成珠）
共研细，以甘草汤洗净，用熟鸡蛋黄炒出油，调搽。
指缝搔痒成疮，有窍出血不止 多年粪桶篾箍烧灰敷之。
陈实功曰∶酸痛乃风寒气郁于皮毛，致血不荣于肌表，谓皮槁则多痛，手足似无
皮之状，是酸苦生焉。可将葱汤浸洗良久，随以润肌膏擦之，就暖勿见风冷，自愈。如
每逢冬时即发者，须预于三伏时，晒捣烂大蒜，间擦三次，永不再发。经曰∶寒因热用，其理甚明。（《正宗》）
王肯堂曰∶酸痛，因暴寒侵袭肌肤之中，寒郁不行，偶触衣物，或以手捺，疼
痛连心，俨如无皮之状是也。
Gu Shicheng stated: "Ma Yi Wo" (Ant Hill) arises from unintentional ant bites, or may be formed by the accumulation of Wind-Dampness. It mostly occurs on the hands and feet, resembling an ant nest, looking like a pinhole. It causes extreme itching that penetrates to the heart, and upon rupture, it exudes serous fluid. It is suitable for external application with Chuan Shan Jia (Pangolin Scales). Cases also occur on the back of the hands and wrists.
Xi Hui Gao (Tin Ash Ointment) [Prescription by Chen Chuyang]: Treats Ma Yi Wo and Xue Feng Chuang (Blood Madness Sores), characterized by unbearable extreme itching.
Ingredients: Xi Hui (Tin Ash, finely sifted) 2.5 qian; Qing Fen (Calomel) 1.5 qian; Cong Bai (Scallion White) 1 stalk.
Method: Pound these together with skinless fat from a castrated male pig (Jian Zhu You) to form an ointment. Apply to the sore with a brush, then seal with San Tui Zhi (Three-Retreat Paper). It will heal completely in three days.
San Tui Zhi (Three-Retreat Paper):
Ingredients: Chan Tui (Cicada Slough) 3 qian; Feng Huang Yi (Phoenix Coat/Inner Membrane of Eggshell) 3 qian; Mi Tuo Seng (Litharge) 6 qian.
Method: Boil these in 8 liang of Tong You (Tung Oil) until they form a paste. Brush the paste onto Lian Si Zhi paper and dry in the shade. When using, cut to fit the size of the sore and apply. Change once every three days; after three changes, it heals completely. If itching is extremely severe, apply Xi Hui Gao to conclude treatment.
Another Prescription:
Mi Tuo Seng (Litharge) 3 qian; Bai Cao Shuang (Soot from Hundred Herbs) 5 qian; Feng Hua Duan Shi (Weathered Calcined Alunite) 5 qian; Mei Jiu Qu (Moldy Wine Qu) 1.5 liang.
Method: Grind all into fine powder. First, pound Song Mao Xu (Pine Needle Whiskers) until mashed, decoct in water, and fumigate/wash the affected area thoroughly. Then, fumigate the area with smoke from burning pine needles. Allow discharge to flow freely, wipe dry, then mix the powder with Tong Oil for topical application. Keep moistened with Tong Oil frequently. Change once daily. The root cause will be eliminated in seven days.
Another Prescription:
Da Huang (Rhubarb Root) ground into powder, mixed with Tong Oil for topical application.
Another Prescription:
Wrap the affected area with a lid soaked in Tong Oil. Effect is seen after several nights.
For Ma Yi Wo and sores that are extremely itchy and appear in patches: [Prescription by Wu Yueqian]
Qing Fen (Calomel) 2 qian; Chuan Shan Jia (Pangolin Scales) 1 liang (Roast on a new tile, cut into bean-sized pieces, then stir-fry with earth until beads form).
Method: Grind finely. Cleanse the area with Gan Cao Tang (Licorice Decoction). Fry cooked egg yolk to extract oil, use this oil to mix the powder and apply.
For itching between fingers leading to sores with bleeding from pores that does not stop: Burn the bamboo hoop from a feces bucket used for many years into ash and apply topically.
Chen Shigong stated: "Suan Tong" (Sour Pain/Aching Pain) results from Cold-Wind Qi stagnating in the skin and hair follicles, causing blood to fail to nourish the muscle surface. As the saying goes, when the skin is dry and withered, pain prevails. The hands and feet appear as if devoid of skin, giving rise to sensations of sourness and bitterness. One may soak and wash the area in Scallion Water for a long time, then apply Run Ji Gao (Moisturizing Muscle Ointment). Keep warm and avoid wind and cold; it will heal spontaneously. For those who suffer recurrences every winter, one must prepare beforehand during the San Fu (Dog Days) period: sun-dry and pound garlic, applying it intermittently three times. This ensures it never recurs again. The Classics state: 'Treat cold conditions with heat methods,' which makes the principle very clear. (From *Waike Zhengzong*)
Wang Kentang stated: "Suan Tong" occurs when violent Cold invades the interior of the skin and muscles. The Cold stagnates and fails to circulate. Upon accidental contact with clothing or pressure from the hand, the pain connects to the heart, and the condition appears exactly as if the skin were absent.