There are four main possibilities: first, internal hemorrhoids, which are clinically manifested as anal blood in the stool and anal swelling, and do not cause serious clinical consequences, but if they are complicated by thrombosed external hemorrhoids or hemorrhage, they indicate the progress of the disease. The second, anal papillary fibroids, mostly caused by chronic inflammation of the anus, is a benign tumor of the anus, which can not be specially treated. The third, condyloma acuminata, mainly caused by HPV virus infection, the warts have the possibility of cancer, if not actively treated, the consequences are more serious. The prognosis is relatively poor. It is important to seek medical attention in time to avoid further aggravation of the disease and serious clinical consequences.