The anus outside the growth of a fleshy, not painful may be hemorrhoids, anal polyps, sebaceous cysts and other diseases, it is recommended that the patient to go to the hospital for an examination to clarify the cause of the symptomatic treatment. 1. hemorrhoids: mostly due to patients with constipation and diarrhea, resulting in increased abdominal pressure, is to make the anal region of the skin and mucous membrane swelling and thus lead to blood reflux obstruction, thus forming hemorrhoids. If the symptoms are mild, there is no need for special treatment, improve lifestyle habits, if the symptoms are serious, the main surgical treatment. 2. Anal polyps: may be related to chronic inflammatory stimulation. As the stool stays in the intestinal mucosa for a long time, it may stimulate the mucosal epithelium and lead to the slowing down of epithelial apoptosis, thus forming the formation of polyps. Surgical removal under colonoscopy is usually indicated. 3. Sebaceous cysts: Anal sebaceous cysts are benign lesions that occur in the anal area. It may compress the anal sphincter, and in severe cases may be accompanied by nausea, fever and chills. The enlargement of the cyst may cause pain and swelling, etc. The treatment is mainly surgical removal. There is no pain in the anus, it is recommended that patients go to the hospital anorectal department for diagnosis and treatment, after clarifying the type of disease, symptomatic treatment, and pay attention to a light diet in daily life, do not eat spicy and stimulating food.