Snake bed seed, groundnut, bitter ginseng is a treatment for eczema. Snake bed seed has the efficacy of drying dampness, dispelling wind, killing worms and relieving itching, warming the kidney and strengthening yang (warming and tonifying yang qi in the kidney); Griffonia has the efficacy of clearing heat and inducing dampness (removing heat and dampness in the body), dispelling wind and relieving itching (relieving itching by dispelling the wind that invades the surface of the body); and Bitter ginseng has the efficacy of clearing heat and drying dampness, killing worms and inducing diuresis. 1. Codonopsis pilosula: pungent, bitter, warm, slightly toxic, can be used to treat wet sores, itching, itching and so on. Allergic to the snake bed seed is prohibited, Yin deficiency fire (deficiency of Yin essence in the body, the emergence of excessive fire) and the lower Jiao patients with dampness and heat is prohibited; external use may appear in the affected area, itching, redness, burning and other adverse reactions. 2. Difenzi: pungent, bitter, cold, can be used to treat itching, wet sores, skin itching. Groundnut is bitter and cold, so patients with spleen and stomach deficiency (spleen and stomach weakness and cold) should not use it, and those who urinate too much should not use it. 3. Bitter ginseng: bitter taste, cold nature, can be used to treat swollen yin and itchy yin, eczema, eczema, itchy skin, scabies, leprosy, etc., is the treatment of skin diseases of the drug, single decoction of water to wash the affected area that is effective. It can be used to treat skin diseases. It is effective in washing the affected area with decoction water alone. It can not be used for patients with deficiency of spleen and stomach (spleen and stomach weakness and cold) and deficiency of yin and fluid depletion, and it is forbidden to use for those who are allergic to the drug. Through the efficacy of the above three medicines, these three medicines can treat wet sores. If you need to use the above medicines, it is recommended to use them only after the identification by a Chinese medicine practitioner, and do not use the medicines arbitrarily, so as not to cause adverse consequences.