1, blood in the stool: when you find blood in the stool, do not be careless, to promptly seek medical attention, blood in the stool is common in hemorrhoids, anal fissures, polyps, tumors and other diseases. 2, anal fissure: the onset of the first just pain when the stool is dry, fresh blood, defecation difficulties, if not treated in a timely manner, anal fissures cause infection, the formation of perianal abscess, and the development of anal fistula, should be treated as soon as possible. 3, hemorrhoids: the skin around the anus is elevated, and worsens when defecating. In severe cases, the swelling comes out of the anus after defecation, intermittent blood in the stool or edema, pain, anal itching, dampness and other symptoms, very painful, conservative treatment can relieve the symptoms and slow down the process of aggravation of the disease, to cure the root requires surgery to solve. 4, perianal abscess: red, swollen, painful, feverish and difficult to move in severe cases, the treatment with antibiotics alone is ineffective, should be early consultation incision and drainage. 5, anal fistula: small blisters next to the anus, pus, water, pain, recurrent, if not timely eradication developed into multiple small blisters, simple anal fistula developed into complex anal fistula. The disease can not be cured by medication and injection, and should be cured by surgery as soon as possible.