As the weather gradually warms up, more and more people are finding that the roots of their thighs are red and itchy, and that the red spots and gradually expand outward, making it difficult for people to sit and lie down. This condition is actually common with ringworm, which occurs in summer and is more common in men who sweat a lot, and is also easy to develop in people with certain occupations such as car drivers and people who sit for a long time; ringworm is actually a specific area of ringworm that occurs in the groin, buttocks, and around the anus, and is due to fungal infection; it starts with small patches of erythema and papules on the skin of the inner thighs, which gradually expand from the center to the periphery, while the center tends to improve or It is often accompanied by a distinct itching sensation. In severe cases, it often spreads to the perineum, perianal area, buttocks, etc. It should be clinically differentiated from erysipelas, eczema, intertrigo, and reverse psoriasis. Improve fungal examination if necessary. Prevention and treatment: 1. Wash underwear and socks separately; keep local dryness and ventilation; iron and wash underwear regularly; 2. If you have diabetes and other diseases, you need to actively treat internal diseases; 3. Use topical antifungal preparations (such as miconazole, bifenbendazole, ketoconazole, sertaconazole, boutinafen, etc.). Because of the thin and tender skin of the pubic femoral area, pay attention not to use irritating potions to avoid irritating the skin. General lesions should continue to be applied for 1 week after subsiding to prevent recurrence. 4, such as local treatment effect is poor, involving a wide area, such as no contraindications can be oral itraconazole, terbinafine, etc..