Butt groove long ringworm does not hurt, itchy, belongs to the fungal infection caused by jock itch, can be through the general treatment, drug treatment and other measures to regulate. 1. general treatment: keep the skin clean, hygiene, avoid scratching, underwear, need to choose loose, breathable clothes, diet, choose light food, do not eat too greasy and stimulate spicy ingredients. 2. medication: you can use topical antifungal medication, such as terbinafine ointment, clotrimazole cream, lenbendazole cream, etc.; if the course of the disease is longer, recurrent episodes, you can take oral terbinafine tablets or itraconazole capsules and other antifungal drugs. Ringworm should go to the hospital for examination in time, and all drugs should be used under the guidance of professional doctors.