If the anal ulcer is caused by repeated fecal squeezing resulting in repeated anal fissures, that is, the presence of anal fissures, this situation can be treated with topical Longzhu ointment or Ma Yinglong hemorrhoid ointment, if the anal fissures are old anal fissures formed ulcer surface or need to be surgically removed. If the anal ulcer is caused by recurrent perianal inflammation, which is a result of bacterial infection, it can be treated with topical Bactrim ointment, and if necessary, intravenous antibiotics are needed. If the anal ulcer is caused by perianal cancer, it usually needs to be removed surgically first and then treated with radiotherapy depending on the situation.