The two sides of the buttocks rot, that is to say, refers to the two sides of the anus erosion, mostly caused by eczema, ringworm, warts, can be taken according to the different causes of general treatment, drug treatment and other treatment methods. 1. Eczema: perianal eczema can lead to perianal ulceration, fluid, need to pay attention to skin hygiene, such as found that there is oozing liquid, it is recommended that the external use of glycerine lotion, dexamethasone cream and other treatments. 2. Ringworm: it is caused by fungal infection, mostly attacking the perineum and perianal skin, resulting in redness, swelling, dandruff and vesicles on the skin of these areas, with obvious itching. During the treatment, we should pay attention to local hygiene, change underwear every day, insist on washing with warm water, and then apply antifungal ointment, such as bifonazole ointment, ketoconazole cream and other medications. 3. Perianal condyloma acuminatum can also lead to perianal skin erosion, accompanied by more warty skin. You can go to the Department of Dermatology and Venereal Diseases and use 0.5% tincture of onychomycosis, 5% imiquimod cream and other medications to treat it. About the buttocks on both sides of the ulceration of the causes are more, it is recommended to go to the hospital in a timely manner, after a clear diagnosis, follow the doctor’s instructions, avoid unauthorized use of drugs.