Dry stool, anal bleeding pain is mainly considered to be physiological factors, hemorrhoids, anal fissure and other causes. 1. Physiological factors: excessive consumption of spicy and stimulating foods, drinking less water, mental stress and other physiological factors often lead to dry stools, constipation. Long-term constipation, dry stool may stimulate the intestinal mucosa and anus, causing mucosal congestion, pain, resulting in dry stool, anal bleeding pain and other symptoms. 2. Hemorrhoids: Hemorrhoids are mainly caused by congestion and enlargement of the veins in the anal canal or the lower end of the rectum, which are generally related to constipation, unbalanced diet, and long bowel movement, etc. Patients often suffer from bleeding during defecation, pain, anal itching, and prolapse of hemorrhoids, which are sometimes accompanied by dry stools and constipation. 3. Anal fissure: anal fissure is a small ulcer formed after cracking the skin layer of the anal canal below the dentate line, the etiology and pathogenesis have not been fully clarified, and it is often associated with anal pain, blood in the stool, constipation and other symptoms. It is recommended that after the exclusion of physiological factors, timely medical treatment, by the doctor to clarify the cause of the targeted treatment, to avoid aggravation of the condition, and actively cooperate with the treatment.