Tinea cruris is a disease caused by fungal infections, and the best treatment for this condition is to directly apply antifungal creams. There is no particularly effective medication; the main approach is consistent treatment over a long period, generally at least for one to two months, which can completely cure and eradicate the disease. Poor treatment outcomes are often related to inadequate duration of medication use. After successful treatment, it is important to maintain proper dietary and lifestyle habits, avoid public baths and swimming pools, and refrain from wearing shared slippers. If one has athlete's foot, socks and underwear should not be washed together, pets should not be kept in the house, and if the work environment is humid, frequent bathing and keeping the area dry can be very effective for prevention.