Etiology of anal papilloma: 1. It is caused by infection, trauma or anal canal stimulation, such as chronic intestinal inflammation stimulation, habitual constipation when the stool accumulates in the rectum for too long or the stool is dry and hard. 2. Injury during defecation, secondary bacterial infection. 3. Anorectal ectoderm and subcutaneous tissue hyperplasia can lead to anal papilloma, and there are individual differences in number, shape and size. 4. Most patients with anal nipple hypertrophy have anal cryptitis. Clinically, cases of anal papilloma complicated with anal fissure often cover up the signs of another disease, because one symptom or sign is particularly obvious. It is common that anal fissure is hidden in the root of anal papilloma, which is ignored because the patient can't cooperate with the examination because of pain, or anal papilloma is too deep to be found during operation and missed diagnosis. Therefore, experts from Hainan Xinglin Anorectal Hospital suggest that anorectal diseases should be diagnosed in time and targeted treatment should be carried out after the cause is clear. South Korea's electronic anoscopy can effectively diagnose the cause of anorectal diseases in our hospital. For details, please click Consultation.