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Scratching until bleeding occurs brings relief, which is caused by wind pathogen invading the skin. Use 2-3 whole plants of *Impatiens balsamina* (Fengxianhua, 凤仙花) including roots, decoct in water to wash the affected area to stop itching.

Grind *Phellodendri Cortex* (Huangbai, 黄柏) into powder, mix with pig marrow and grind into a paste, then apply to the lesion. Alternatively, applying bovine spinal cord marrow is also effective.

Dry the root of *Narcissus tazetta* var. *chinensis* (Shuixianhua Gen, 水仙花根), grind into powder. If the lesion is moist, sprinkle the powder directly; if dry, mix with sesame oil (*Sesami Oleum*) for application.

This condition starts on the toes and gradually spreads up to the knees, presenting with black discoloration, sunken appearance, unbearable pain, and sequential shedding of digits. It may also occur on the hands. Grind wild hornet nests (Tufengfang, 土蜂房) into fine powder, mix with vinegar, and apply topically for rapid cure; this is truly a miraculous prescription. Internal administration of *Qu Shi Bao Tuo Tang* (Dampness-Expelling and Preservation-Decoction) from *Shi Shi Mi Lu* is required: Coicis Semen (Yiyiren, 薏苡仁) 3 liang, Poria (Fuling, 茯苓) 2 liang, *Eucommiae Cortex* (Duzhong, 杜zhong) 1 qian, Atractylodis Macrocephalae Rhizoma (Baizhu, 白术) 1 liang, Plantaginis Seed (Cheqianzi, 车前子) 5 qian. Decoct in water and take orally. Take ten doses consecutively to prevent recurrence permanently.

It often grows at the edge of toenails, bleeds frequently, and causes unbearable pain. Realgar (Xionghuang, 雄黄) 5 fen, Snake Slough (Shetui, 蛇蜕) burned to retain its properties 1 fen, both ground into fine powder. First, wash the wound with warm rice washing water, use a sharp knife to remove the nail corner, dry thoroughly, apply the medicine, wrap with silk gauze for about half a day, replace when the medicine becomes wet, repeat several times until healed. For those afraid of using knives, prick the area with an orange tree thorn. Alternatively, use the Ingrown Nail Ulcer Prescription: Slowly boil brown sugar into small balls, burn to retain properties, grind into powder. Add Calomel (Qingfen, 轻粉) 2 fen and Musk (Shexiang, 麝香) a little per qian of powder, mix with sesame oil (*Sesami Oleum*) for application. Ingrown nails will heal within two to three days.

Chronic non-healing cases are named Skirt-Edge Wind Ulcer (Qunbian Fengchuang, 裙边风疮). Use male scalp dandruff/scum, mix with tung oil (*Verniciae Oleum*) to make a plaster applied through paper.

Cases with protruding malignant flesh are named Stinky River Snail (Choutianluo, 臭田螺). Expose green vitriol (Zaofan, 皂矾) to sun and dew for three days. Use 1 liang decocted in water for soaking and washing. Also, mix 1 liang of vitriol powder with Realgar (Xionghuang, 雄黄), Sulfur (Liuhuang, 硫磺), Frankincense (Ruxiang, 乳香), and Myrrh (Moyao, 没药) each 1 qian, grind uniformly, and apply.

Apply ash from a urine bucket used for many years.

One cooked egg yolk and 1 qian of yellow beeswax, rendered into oil for application.

Boil scallions with stems and leaves in water for soaking, 3-5 times daily, highly effective.

Grind *Cortex Lycii* (Digupi, 地骨皮) together with Red Herb (Hongyao, 红药, likely referring to *Paeonia lactiflora* / Red Peony Root) finely and apply; healing occurs the next day.

Mix Calcined Alum (Kufan, 枯矾), Lead Oxide (Huandan, 黄丹), and Mirabilite (Puxiao, 朴硝) in equal parts, grind into powder, rub 3-5 times until healed.