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Mash Chinese yam (Dioscoreae Rhizoma) into a paste. Apply it to the affected area, and it will disappear immediately.

Dry *Adenophorae Caulis et Folium* (Wasong) in the shade and grind it into powder. First, wash the affected area with a decoction of *Sophorae Flavescentis Ramulus* (Huai), *Pruni Mume Fructus* (Mei), and *Allii Fistulosi Bulbus* (Congbai). Then, sprinkle the powder on the wound. It will take effect immediately.

Burn crucian carp (Cyprinus carpio) to ash, mix with sauce, and apply to the affected area.

**Ointment for Toxic Sores**: Highly effective when applied to all types of swelling and sores.
Ingredients: *Ricini Semen* (Bimazi, 4 liang, de-oiled and skin removed), *Draconis Sanguis* (Xuejie, 3 liang), *Bufo Venenum* (Chansu, 1 liang, emulsified), *Olibanum* (Ruxiang, 1 liang, de-oiled), *Pistacia Resina* (Songxiang, 1.5 liang, kneaded until white).
Add 3 qian of top-grade *Moschus* (Shexiang). Prepare as an ointment and apply to all types of swelling and sores; it is highly effective.

Mix very fine iron filings with good vinegar, boil for two or three times boiling, then remove the iron filings from the vinegar and lay them on the affected area. Take a large piece of high-quality lodestone (magnet), and frequently use it to attract/suck over the area. For Yin-type conditions, this method will naturally expel the toxin.

Take 50 jin of *Datura Metel Flos* (Niaoyanghua), select the cleanest flowers, and decoct into an ointment. Add 1 liang each of *Aconiti Radix Lateralis Preparata* (Chuanwu) and *Aconiti Kusnezoffii Radix Preparata* (Caowu). When encountering furuncles or toxic sores, use a brush to dip the medicine and apply it to the affected area.

Harvest single-stem *Xanthii Herba* (Cangercao) (one whole plant including leaves and seeds).
Cut finely without using iron tools. Place in a clay pot with two large bowls of water, and decoct until one bowl remains. If the sore is in the upper part of the body, drink slowly after meals, wait for vomiting. After vomiting subsides, take again until the medicine is finished. If the sore is in the lower part, take on an empty stomach; the sore will spontaneously rupture and discharge pus. Then apply an ointment plaster. This formula was passed down by Mr. Zhang Bowang of Jingzhao; later, his brothers all passed the imperial examinations.

**Treatment for Back Carbuncle, Opposite Mouth Ulcer, and All Suppurative Sores with Ulceration**: Has life-saving effects.
Ingredients: *Plumbum Acetatum* (Gongfen, 1 liang), *Hydrargyri Oxydum Rubrum* (Qingfen), *Cinnabaris* (Yinzhu), *Realgar* (Xionghuang), *Olibanum* (Ruxiang, purified), *Myrrha* (Moyao, 2.5 li fen each, purified).
Grind all together into an extremely fine powder. To use, first wash the affected area with a strong decoction of good tea leaves. Then, cut open a pig kidney, sprinkle 5 fen of the powder onto the kidney, and cover the affected area with it. Wait until the medicine feels hot like steaming, then remove. Once a day. It extracts toxins, reduces pain, and promotes the discharge of pus and foul matter. Do not squeeze with hands. Mild cases heal in two applications; severe cases heal in seven or eight applications. This formula has saved many people.

In Tonglu, there was a person whose mother suffered from a back carbuncle. Various treatments failed to cure her. Upon obtaining this formula, she recovered completely.
Take 5 fruits of *Trichosanthes Fructus* (Gualou), extract the seeds, and remove the shells.
Take 5 pieces of *Olibanum* (Ruxiang), each the size of a date.
Grind these two ingredients into a fine powder. Use 1 jin of white honey to decoct together into an ointment. Take 3 qian per dose, dissolved in warm yellow wine.