Itchy buttocks in adults may be caused by eczema, fungal infection, pinworms, etc. General treatment or medication can be chosen according to the cause. 1. Eczema: manifested as pimples, papules, blisters and other manifestations, which can occur in the buttocks or perianal area. It is often accompanied by intense itching and recurrent episodes. This situation should avoid scratching, scalding, you can choose cold wet compresses, topical glucocorticoids, such as mometasone furoate ointment to relieve local inflammation. 2. Fungal infection: Itchy symptoms can be caused by fungal infections such as dermatophytes. It can be treated with topical antifungal drugs, such as econazole ointment. 3. Pinworms: related to pinworm infections, can cause perianal itching, exacerbated at night. Attention should be paid to local hygiene, and at the same time with the use of anthelmintic drugs, such as topical albendazole and other treatment. In short, adults with itchy buttocks should go to the hospital in time and be treated under the guidance of doctors.