Anus valgus is one of the most common symptoms in anorectal department. There are many reasons for anus valgus, such as prolapse of internal hemorrhoids and hemorrhoids, prolapse of rectal mucosa, rectal polyps, rectal tumors, etc., which may lead to anus valgus. Of course, there are also some very rare diseases in clinic, such as neuroendocrine tumor, rectal stromal tumor, etc., which may also lead to anal ectropion. There are also some abdominal compression diseases, which may also lead to anus valgus. When the patient has the symptom of anus valgus, it is recommended to avoid sitting, squatting and standing for a long time, and try to relieve the action that increases the abdominal pressure. At the same time, it is recommended to go to the hospital as soon as possible to further clarify the cause.