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Yang syndromes transforming into Yin syndromes are the fault of unqualified practitioners overusing cooling herbs. Before the eleventh day, when pus has not yet formed, administer warming and spleen-strengthening formulas; if there is no response, it is a pure Yin syndrome that is difficult to cure. After the fifteenth day, when pus has already emerged, administer Tuoli Wenzhong Tang (Support Interior and Warm Middle Decoction) and Shierwei Yigong San (Twelve-Ingredient Extraordinary Efficacy Powder). For mild cases, use Shiquan Dabu Tang (Ten-Absence Great Tonifying Decoction), doubling the dosage of Renshen (Ginseng Radix et Rhizoma), Guizhi (Cinnamon Twig), and Fuzi (Aconite Lateralis Radix Praeparata) to rescue the patient. Auspicious signs include the wound becoming hot and painful, pus draining, appetite improving, body temperature normalizing, and pulse recovering. This occurs because the condition originally stemmed from Yang, hence survival is possible.

Yin syndromes transforming into Yang syndromes result from the abrupt and excessive use of hot herbs in large prescriptions. Although slight swelling, redness, pain, and pus may appear, they ultimately do not resemble the vibrant redness of true Yang syndromes, nor do they produce thick, dense yellow pus. The wound will soon revert to Yin because it originally stemmed from Yin, leading to death.

When a swelling ulcer first ulcerates or has been lanced, fearing the incision might close prematurely, insert a cotton-paper wick dipped in Yuanzhu Gao (Pearl-like Ointment) into the wound, or melt Huangla (Beeswax) with a small amount of Xiangyou (Sesame Oil) to form a nail-shaped wick. A thread must be wrapped around the center as a core. Insert the wax wick into the incision, leaving the thread end outside, and cover with ointment. Replace the insertion daily as before.

If necrotic tissue does not discharge from the wound, use a paper-thread wick to twist the frayed tip against the necrotic tissue, grasping the dead flesh and slowly pulling it out. If not clean, repeat. Then apply Jiangzhu Gao (Crimson Pearl Ointment); if necrosis is cleared, apply Jiangzhu Gao, and paste Ganzhu Gao (Blue-Green Pearl Plaster) on the surrounding swollen areas. For stagnant pus and swelling that fails to drain, crush fresh garlic and mix with Songxiang powder (Pine Resin) for topical application.

For ulcers that have already broken down, containing a black Ding (carbuncle/furuncle) protruding like a chopstick head, hard and painfully intolerable, grind Zijiang Zhenxiang (Purple Crimson True Agarwood) into bean-sized pieces, stir-fry until charred black, and powder it. Sprinkle this powder onto the Ding. Apply Lanxue San (Orchid Snow Powder) to the surrounding ulcerated areas, and cover with Hei Gao (Black Plaster). After two or three applications, the Ding will completely disappear, then switch to Jiushengji Yao (Flesh-regenerating medicines).

For stubborn necrotic tissue in robust patients, apply Sheng Nanxing powder (Rhizoma Arisaematis) mixed with Bingpian (Borneol). Cover with plaster overnight; the necrotic tissue will fall away like a well-dug cavity, then replace with flesh-regenerating medicines. For weak patients, sprinkle Renshen powder (Ginseng Radix et Rhizoma), wash after one night. After two or three applications, the necrotic tissue will naturally detach, facilitating easy healing and contraction.