The most common disease of anal skin fall is hemorrhoids, hemorrhoids according to the location can be divided into internal hemorrhoids and external hemorrhoids. External hemorrhoids in the anus can be seen as a soft mass of fleshy redundancy, actually varicose vein mass, can be accompanied by blood in the stool, itching of the skin around the anus or localized pain, this situation pay attention to avoid sitting for a long time, feasible warm-water sitz baths or medication applied locally, to prevent the disease from progressing. This symptom is also common in the skin itself, because the skin around the anus is rich in sebaceous glands, prone to inflammatory changes in the skin, such as boils, carbuncles and so on. When the inflammation subsides, the local skin may undergo scarring, which is manifested by a painless skin drop on the surface of the protruding skin, and this situation can be observed on follow-up. It should be noted that rectal diseases such as rectal tumors, when the tumor grows to a certain size, can be protruding from the anus outside the growth of this disease of the skin fall brittle, easy to bleed and irregular shape requires pathological examination and early treatment.