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The clinical manifestations of tinea (Xuan) mainly include six types, with root causes generally attributed to Wind-Heat, Dampness, and Parasites (Chong). These specifically include Dry Tinea, Wet Tinea, Wind Tinea, Psoriasis-like Tinea (Niu Pi Xuan), Pine Bark Tinea (Song Pi Xuan), and Knife-shaped Tinea (Dao Xuan). Among them, the facial tinea occurring in spring is often referred to as Peach Blossom Tinea.

[Note] This condition is generally caused by Wind-Heat-Damp pathogens invading the skin. After prolonged stagnation, Wind becomes excessive and transforms into "Parasites" (referring to pathogenic microorganisms or pathological products), resulting in incessant itching. There are six specific names: First, Dry Tinea, where scratching produces white scales and the skin appears dry and withered; Second, Wet Tinea, where scratching exudes sticky fluid that spreads and resembles worm tracks; Third, Wind Tinea, which refers to chronic, stubborn tinea unhealed for years, characterized by numbness and insensitivity to pain or itch upon scratching; Fourth, Niu Pi Xuan (Psoriasis-like Tinea), where lesions resemble the thick and hard skin of a cow's neck; Fifth, Song Pi Xuan (Pine Bark Tinea), where lesions resemble the bark of an old pine tree, with connected red and white spots and frequent itching; Sixth, Dao Xuan (Knife-shaped Tinea), where lesion contours are indistinct and distribution is irregular without fixed shape. The general treatment principle involves applying herbs that kill parasites, drain dampness, and detoxify externally. For mild cases, Yangti Gen San (Shepherd's Purse Root Powder) is used; for chronic and stubborn cases, Bixiao San (Surely Effective Powder) is applied topically. In some cases where Spleen and Lung Wind-Dampness are excessive, leading to swelling and pain, Sanfeng Kushen Wan (Wind-Dispersing Sophora Pill) is suitable to disperse Wind-Dampness, thereby resolving swelling and pain. Additionally, there is Wind Tinea on the face, initially appearing millet-sized or gradually forming small sores, accompanied by intermittent pain and itching, occurring in spring. It is also called Chuihua Xuan (Blowing Flower Tinea), commonly known as Peach Blossom Tinea, and is more common in women. This condition arises from Wind-Heat in the Lungs and Stomach rising with Yang Qi. It is suitable to take Shufeng Qingre Yin (Wind-Dispersing Heat-Clearing Decoction) internally and apply Xiaofeng Yurong San (Wind-Dispersing Jade-Face Powder) externally, washing daily for effective results.

Yangti Gen San (Shepherd's Purse Root Powder)
Rumex japonicus Herba (ground, 8 qian) Alumina Calcinate (2 qian)
Grind uniformly together, mix with rice vinegar, and rub onto the affected area.

[Formula Verse] Yangti Gen San applies to various tinea, Rumex japonicus Herba combined with Alumina Calcinate, Two ingredients ground into powder plus rice vinegar, Rubbing on the lesion drains dampness and cures itch.

Bixiao San (Surely Effective Powder)
Hibiscus mutabilis Cortex (4 liang) Saposhnikoviae Radix (2 liang) Rheum Palmatum Rhizoma (2 liang) Myrobalan Ferment (1 liang 4 qian) Crotonis Fructus (de-oiled, 1 qian 5 fen) Mylabris (whole, 1) Realgar (4 qian) Calomelas (4 qian)
Grind into extremely fine powder. Mix with Yin-Yang Water (a mixture of fresh well water and boiled water). Scratch the tinea lesion slightly before applying a thin layer. Wait for the dried medicine to fall off naturally.

[Formula Verse] Bixiao contains Rheum Palmatum Rhizoma and Myrobalan Ferment, Hibiscus mutabilis Cortex, Saposhnikoviae Radix, Crotonis Fructus, and Mylabris, Realgar and Calomelas with Yin-Yang Water, Mixed and rubbed on stubborn chronic tinea.

Sanfeng Kushen Wan (Wind-Dispersing Sophora Pill)
Sophorae Flavescentis Radix (4 liang) Rheum Palmatum Rhizoma (stir-fried until fragrant) Angelicae Pubescentis Radix Saposhnikoviae Radix Aurantii Fructus (bran-fried) Scrophulariae Radix Coptidis Rhizoma (each 2 liang) Scutellariae Radix Gardeniae Fructus (raw) Chrysanthemi Flos (each 1 liang)
Grind into fine powder, make pills with refined honey, size like Sophora seeds. Take 30 pills each time, after meals with warm boiled water. Use three times daily, can also be taken with tea or wine.

[Formula Verse] Sanfeng Kushen disperses excess Wind-Damp, Tinea sores often have itch, swelling, and pain, Rheum Palmatum Rhizoma, Scutellariae Radix, Angelicae Pubescentis Radix, Saposhnikoviae Radix, Aurantii Fructus, Scrophulariae Radix, Gardeniae Fructus, Chrysanthemi Flos, and Coptidis Rhizoma.

Shufeng Qingre Yin (Wind-Dispersing Heat-Clearing Decoction)
Sophorae Flavescentis Radix (soaked in wine, steamed and sun-dried nine times, stir-fried yellow, 2 qian) Scorpio (earth-fried) Tribulus Spinulose Fruit Zanthoxyli Fructus Saposhnikoviae Radix Schizonepetae Spica Honeysuckle Flower Cicadae Periostracum (stir-fried, each 1 qian)
Take one cup of wine and one cup of water, add three cun long green onion white parts, decoct until one cup remains. Strain dregs, drink hot. Avoid stimulant foods.

[Formula Verse] Shufeng Qingre Yin treats Wind Tinea, Intermittent pain and itch are extremely lingering, Sophorae Flavescentis Radix, Scorpio, Tribulus Spinulose Fruit, Zanthoxyli Fructus, Saposhnikoviae Radix, Schizonepetae Spica, Honeysuckle Flower, and Cicadae Periostracum.

Xiaofeng Yurong San (Wind-Dispersing Jade-Face Powder)
Vigna radiata Semen (3 liang) Chrysanthemi Flos Aconiti Kusnezoffii Radix Preparata Angelicae Dahuricae Radix (each 1 liang) Refined White Sodium Chloride (5 qian)
Grind into fine powder, add 5 fen Borneolum Syntheticum, grind uniformly again and store. Use daily for face washing instead of soap.

[Formula Verse] Xiaofeng Yurong San uses Vigna radiata Semen, Chrysanthemi Flos, Aconiti Kusnezoffii Radix Preparata, Angelicae Dahuricae Radix, and Refined White Sodium Chloride, Ground with Borneolum Syntheticum to replace soap, Dispelling Wind and removing tinea is paramount.