First of all, the specific causes of anal ulcers can be clarified in order to target the treatment. The common diseases that cause anal ulcers are perianal abscess, hemorrhoids, condyloma, perianal eczema and malignant tumors in the rectum. The simple anal ulcers can be used topically with furnace glycerin lotion, after cleaning, apply erythromycin ointment; also can be cleaned with potassium permanganate dilution, apply Bactrim ointment, take antibiotics to treat the infection under the guidance of the doctor. The diet should be light and avoid spicy and irritating food. If the effect is not obvious after symptomatic treatment, it is recommended to go to the hospital in time for examination to determine the specific causes of anal ulceration and to treat the symptoms to avoid delaying the condition.