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Named "Ox-Head Carbuncle" (Niutou Yong), characterized by redness and swelling:
Take scallion heads with roots (chopped), mix with hot glutinous rice paste, and apply as a poultice. For severe cases, applying 5–6 times will cause it to resolve.

Leiwan Sanqian (Polyporus Umbellatus, 3 qian), Qingfen (Calomelas, 1 qian), and Zhen Fuling (Poria Cocos, 1 qian), ground into fine powder for external application. (This is the formula of Tianzi Qibo)

Raw soap fruit (remove seeds, strings, and membranes), mashed into a paste, mixed with good vinegar, and applied externally; highly effective.

For cases with unbearable foul odor persisting for over ten years without healing, where medication leads to cure miraculously:
Take one piece of newly kiln-fired Duan Shi (Burnt Alum or similar mineral salt), dissolve with water into a powder, blend evenly with genuine raw Tung Oil. First, wash the area with decoction of Sichuan pepper and scallion, then apply this mixture.

If bird-like shapes, loose hair, or vegetable debris emerge from the ulcer:
Smoke the area with incense made from burning dog feces (dry and white ones); once all foreign matter is expelled, it heals spontaneously.

Taking this prevents toxic pathogens from attacking internally or transforming into malignant conditions:
Niu Pi Jiao (Hide Glue, 4 liang), steamed until melted, taken with good wine (or warm water if alcohol is not consumed).

Chew longan aril until extremely soft like paste, then apply to the lesion (males use females to chew, females use males to chew).

Bie Jia (Tartar Testudinis, turtle shell) stir-fried into powder, mixed with sesame oil for external application.

Dong Gua Pi (Winter Melon Peel) dried and powdered for application, also decocted for washing.

One copper coin, mashed together with Youyan (Arionidae slug/snail, commonly known as nose-slime worm), using the coin to scrape and apply the mixture on the affected area; highly effective. (Also treats lower back pain and all kinds of unnamed swellings and sores)
Another prescription: Hei Qian (Black Lead, 3 liang), fried into ash, mixed with vinegar, spread on old cloth, and applied externally. Change once daily. After half a month, if there is no pain or breaking, it resolves internally.

Li Zi (Chestnut, specifically those that are blackened and inedible, including shell, baked dry on tiles), Hai Piao Xiao (Sepiae Endoconcha), in equal parts, ground into powder, mixed with honey for application. Additionally, take 2 qian mixed with Jin Yin Hua Tang (Honeysuckle Decoction) orally.

Fu Ping (Spirodela Polyrrhiza) decocted for juice, used for soaking and washing for half a day.

Millennium Duan Shi (Aged Burnt Alum) ground into powder and applied for immediate pain relief and healing. Alternatively, apply fresh yellow cow dung mixed with water while warm.

Xie Ke (Crab Shell) roasted crisp, ground into powder, taken with yellow wine before sleep. Or, burn human feces to ash, mix with vinegar, and apply externally.

Dou Fu Zhi (Tofu Juice) boiled into a paste for application. (Applicable to both Yin and Yang syndromes)

Bai Fan (Alumen, 1 jin), sun-dried on the Dragon Boat Festival (Duanwu), stored for later use. When needed, grind into water for topical application. Alternatively, boil small eggplant pods after frost for washing.
Another prescription: Qiu Fu Rong Ye (Autumn Hibiscus Leaf) ground and mixed for application around the periphery, leaving the center open. Also, extract juice, mix with wine, and drink. (Root bark can also be used).