The rash usually subsides after 2-3 weeks of treatment, but the patient must adhere to a full course of medication. Tinea cruris, a fungal infection of the groin area, is usually caused by the fungus Tinea dermatica and is a superficial fungal disease caused by fungal growth in a humid and sweaty environment, occurring mostly in the summer. The patient’s rash is usually a central red patch with elevated edges and fine scales visible on the surface. Patients generally apply topical antifungal creams, such as Dakine or terbinafine cream, from the edge of the lesion to the inside, twice a day, generally 1 week erythematous scales reduce, itching reduced; 2 weeks lesions become reddish-brown, almost no itching; 3 weeks lesions become brown patches, at this time the patient no itching, but must adhere to continue to use drugs for 2 weeks to consolidate maintenance treatment to prevent recurrence. During the treatment period, patients need to pay attention to personal hygiene, underwear should be ironed and dried, keep local ventilation, try not to use public supplies or go to public places less or not, avoid contact with small moving objects, especially rabbits or dogs and cats.