Tinea cruris is caused by fungal infection. This disease is highly infectious and recurrent, and it will not heal by itself without formal treatment. Instead, the affected area will become larger and the infection will become more severe. It may lead to fungal infections on the buttocks and even other parts of the body.

It is recommended to apply antifungal cream twice a day. The treatment should be extensive and prolonged, and the area of application should be large. During the treatment period, it is beneficial to use sulfur soap for local washing, expose the area to air frequently, and keep it dry and ventilated, as these measures can help to completely eliminate the deep-seated fungi. Avoid public baths and swimming pools, try not to keep small animals at home, and if you do, maintain good hygiene, especially disinfecting and exposing undergarments to sunlight frequently.