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Huadu Wan (Toxin-Resolving Pill): Treats internal Ding (carbuncle).
Cinnabar, Realgar (each 1 qian), Cicada Slough (10 pieces), Raw Borax, Calomel (each 5 fen), Musk (1 fen), Borneol (0.5 fen).
Grind the above ingredients into fine powder. Use Toad Venom to form pills, sized like mung beans. Use one pill each time, place it on the tongue and dissolve slowly to induce salivation; rinse thoroughly with well water after dissolution. If this pill is unavailable, using pure Toad Venom alone as a substitute is also acceptable.

Pili Huo (Thunderbolt Fire): A miraculous formula for inducing sweating to treat internal Ding syndrome. Whenever a Ding sore is first perceived and no diaphoretic medicine has been taken, after several days when external symptoms have subsided but toxicity enters the interior, manifesting as redness and swelling in the chest, abdomen, or hypochondrium, this indicates the onset of internal Ding. It is appropriate to use this method to induce sweating so that the toxic qi can be expelled.
Place a water bucket and an iron pot beforehand. Let the patient lie on their side on the bucket, covering the surroundings with clothes and quilts to prevent heat leakage. Then, heat river stones until extremely red, place them in the iron pot, set the pot inside the bucket, and pour vinegar into the pot to quench it, generating steam to fumigate and induce sweating. If sweat is not profuse, add more fire and continue quenching. It is necessary to ensure the affected area sweats thoroughly; whole-body sweating is not required.

The *Ling Shu* states there are five parts of the body corresponding to the Five Zang organs: one is the Fubao area, two is the calf (the fleshy part of the lower leg), three is the back, four is the Shu points of the Five Zang organs, and five is the neck. If carbuncles or ulcers occur in these five parts, death ensues.
Wang Haicang stated that the brain, beard, temples, and chin are also sites where carbuncles or ulcers invariably lead to death.
The *Gui Yi Fang* lists seven places where carbuncles or ulcers should not occur: the hollow behind the eyes; the junction of the chin and mandible; between the pubic hair above the root of the genitals; the junction of the hip and sacrum; the junction of the temporomandibular joint before and after the ear gate; carbuncles formed due to wind-water in the lower abdomen; the hollow below the mandible near the ear; and the middle of the nasal bone. Carbuncles in these places can be fatal. Although various treatments may cure some cases, the hollow behind the eyes is the most dangerous.

There are nine places on the back where carbuncles should not occur: the first is the hairline at the occiput, known as Yuzhen, also called the root of the tongue; the second is the cervical vertebrae; the third is identified as Chonggu; the fourth is Dazhui, corresponding to the Five Zang organs; the fifth is Feishu on both sides of the spine; the sixth is Pishu and Ganshu on both sides of the spine; the seventh is Shenshu on both sides of the spine; the eighth is Jiwei on the posterior heart; the ninth is the Jiwei bone point.
There are five places on the front where carbuncles should not occur: the first is the laryngeal bone, known as Chuiping; the second is the center of the chest, known as Shen She; the third is Xinjiwei; the fourth is the point between the two breasts; the fifth is two cun below the umbilicus, known as Changqujian.
There are three places on the side where carbuncles should not occur: the depression in the center of the jaw angle near the ear, known as Houmai; the point below the arm, known as Jiangu; and the point three cun above Chengshan, known as Chang (textual error likely, referring to intestinal connection).

Carbuncles occurring in the Upper Jiao are Yang syndromes, representing excess obstruction. It is suitable to use warm-cooling decoctions to resolve and clear accumulated heat, allowing it to attack outward, followed by applying anti-swelling and toxin-expelling plasters. If the lesion has hardened, use opening agents to wait for the abscess to rupture and drain pus. Once the pus and swelling subside, apply flesh-regenerating medicines, then finally close the wound. One must also guard against external wind-water invasion, avoid foods that trigger wind-heat such as fermented sauces, noodles, and toxic substances, and abstain from sexual intercourse.
Carbuncles occurring in the Middle Jiao, located above the waist, either anteriorly or posteriorly without fixed location, present as stagnant conditions. They arise due to deficiency regardless of size. Those starting at Xinjiwei are the most critical. The areas near the axillae are deficient zones. Carbuncles arising under the hypochondrium down to above the umbilicus, and one to two cun lateral to the umbilicus, cause Qi stagnation, becoming hard and difficult to suppurate. These areas are prone to difficulty in opening and healing. It is necessary to first administer warming internal tonics, then apply hot plasters to soften the area, allowing slow rupture. Do not rupture hastily, as this causes continuous day-and-night drainage; slow rupture allows single-drainage ease of care. For the posterior heart region, specifically below Pishu at the 11th thoracic vertebra, above Shenshu at the 14th thoracic vertebra, and below Shenshu at Yaoshu, carbuncles here risk internal attack of toxicity because these are extremely deficient areas. When a carbuncle arises, one must first tonify internal Qi to strengthen it before rupturing. Strong internal Qi prevents internal attack and facilitates suppuration. However, carbuncles in the waist and legs often become fistulas; preventing excessive sexual activity is paramount.
Carbuncles occurring in the Lower Jiao present as flowing injections and deficiency patterns. Swellings in the anterior genital and thigh areas, resembling chicken eggs, extend horizontally inward. Initially, swollen nodules form, later surrounded by edema, merging into hard masses with blue-black color. First, administer mild internal medicines for three to five days, then use softening powders and compresses. Apply compresses until soft, then open the abscess. After opening, the wound extends internally as a long sinus. Upon rupture, urgently apply detoxifying ointments to extract pus. Once pus is exhausted, apply wound-closing medicines. Since there is little tissue to destroy in this area, flesh regeneration is unnecessary.
The aforementioned texts (*Ling Shu*, *Gui Yi Fang*) describe these locations in detail, which have now been incorporated into respective sections. The meridian affiliations and guiding herbs are found in the first volume's Meridian Chapter. The methods for early, middle, and late stages, internal resolution, external treatment, and differentiation of exterior/interior and deficiency/excess should be sought in the Tumors and Ulcer sections. Modern specialists who boast of secret manuals with illustrated diagrams and specific names for treatment methods are largely unreliable. Some materials have been collected (e.g., from *Huo Wen*). This is merely to broaden knowledge; do not adhere strictly to them.