Buttock groove itch should be based on the cause of the selection of ointment, if it is ringworm, you can use topical clotrimazole ointment, terbinafine ointment; if it is eczema can be zinc oxide ointment, hydrocortisone ointment; if it is a contact dermatitis, you can use dexamethasone ointment, fluoride acetate easy ointment and so on. 1. ringworm: fungal infection of the groin, perineum and buttocks and other parts of the formation of ringworm, can also cause itchy buttock groove symptoms, can be used externally clotrimazole ointment, terbinafine ointment, bifenbenzazole cream and other antifungal drug treatment. If necessary, take itraconazole orally. 2. Eczema: a variety of factors stimulate the buttock groove eczema, can also lead to itchy buttock groove, you can use zinc oxide ointment, hydrocortisone ointment and other medications. If necessary, take oral antihistamine drugs such as loratadine. 3. Contact dermatitis: due to contact with some easily sensitized or irritating items after the occurrence of allergic reactions or irritation, can also lead to buttock groove itch, the first need to clarify the causative factors, followed by symptomatic treatment, such as the external use of dexamethasone ointment, fluorine acetate ointment and other glucocorticosteroid ointment, combined with oral antihistamines such as cetirizine, or short-term oral hormones such as prednisone and other medications. Buttock groove itch may have other reasons, it is recommended to go to the hospital in a timely manner to clarify the cause of the disease, follow the doctor’s prescription medication, do not self-medication.