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Chancre caused by lacquer toxin arises, with open pores leading to swelling and redness. Initially itching is felt, followed by rashes; broken skin weeps fluid and causes pain.

[Note] This condition arises because the body's pores (skin texture and sweat apertures) are not dense enough, allowing one to contract the toxic nature of lacquer which is acrid and hot. At onset, the face itches and swells; scratching leads to a rash resembling urticaria (wheals), which turns red and spreads across the limbs causing pain. The skin breaks down, oozing fluid; in severe cases, alternating chills and fever occur. It is advisable to apply Sanbai San (Three Whites Powder) mixed with leek juice topically, and take Huaban Jiedu Tang internally. Avoid bathing in hot water, and refrain from greasy, strong-flavored foods and "fa-wu" (stimulating foods that may trigger diseases). Alternatively, grinding Shenqu (Medicated Leaven) into powder and mixing it with raw crab roe for topical application on the affected area is particularly effective.

Sanbai San (Three Whites Powder)
Qianfen (Lead Carbonate, 1 liang) Qingfen (Calomel, 5 qian) Shigao (Gypsum Fibrosum, 3 qian)
Grind together uniformly, mix with leek juice for topical application, and cover with paper. If leek juice is unavailable, cool boiled water can be used for mixing.

[Prescription Verse] Sanbai San applied to chancre eliminates it, Calomel, Lead Carbonate, and Gypsum combined; clearing heat and detoxifying works swiftly, must be ground uniform with leek juice.
Huaban Jiedu Tang (See section on Erysipelas arising internally in the rib region)

Blood Arrow presents as blood shooting out from hair follicles, caused by blazing Heart Fire forcing blood to circulate chaotically. Apply Taohua San (Peach Blossom Powder) mixed with cool water, then apply gold ink to stop bleeding immediately.

[Note] This condition is also known as Ji Nu (subcutaneous bleeding). It is caused by excessive fire in the Heart and Lungs, forcing blood to shoot out from the pores like an arrow. It is advisable to take Liangxue Dihuang Tang internally, and use Taohua San externally mixed with cool water; or grind gold ink into powder, mix with vinegar for cold application, and the bleeding will cease.

Liangxue Dihuang Tang (Cooling Blood Rehmannia Decoction)
Shengdi (Radix Rehmanniae Preparata, 3 qian) Huanglian (Rhizoma Coptidis), Danggui (Radix Angelicae Sinensis) (each 1.5 qian) Gancao (Radix Glycyrrhizae), Zhizi (Fructus Gardeniae, raw, crushed), Xuanshen (Radix Scrophulariae) (each 1 qian) Huangqin (Radix Scutellariae, 2 qian)
Use two bowls of water, decoct until reduced to 0.8 bowl. Adjust dosage according to whether the disease location is upper or lower.

[Prescription Verse] Liangxue Dihuang treats blazing Heart Fire, blood overflowing from pores fails to return to vessels; Coptis, Angelica, Licorice, Scutellaria, and Gardenia; Scrophularia decocted and taken shows miraculous efficacy.
Taohua San (Peach Blossom Powder)
Bai Duanshi (Alumen, half sheng), sprinkle with water to make into powder, stir-fry together with Dahuang slices (Rhei Radix et Rhizoma, 1.5 liang) until the ash turns red; remove Dahuang, sieve the Duanshi finely, and mix with cool water for topical application.

[Prescription Verse] Peach Blossom Powder is best for stopping bleeding, one liang five qian of raw Rhei Radix et Rhizoma, half sheng Alumen stir-fried together; remove the general (Dahuang), grind and sieve, mix with water for strong effect.