Constipation with blood in the stool is often associated with dry stool, hemorrhoids, anal fissures and intestinal lesions. It is recommended that patients pay more attention to diet regulation on a daily basis to promote the smooth discharge of stool and improve constipation and blood in the stool. Common causes and related recommendations are as follows: 1. Dry stool: too dry stool rubbing the rectal mucosa will cause it to bleed. In addition, if the dry stool is difficult to discharge, the patient violently defecates to increase the abdominal pressure, which can also lead to anal canal skin mucosa fracture, thus causing bleeding. At this time, you can use open plug to assist defecation, and drink more water in daily life; 2, hemorrhoids: in the case of constipation, dry stool, hemorrhoids are prone to rupture and bleeding, often manifested as blood or dripping out of the hand paper after the stool. At this time, warm water sitz baths are available to relieve perianal discomfort. Diet should try to avoid cold, greasy food, such as fried chicken, ice cream, etc.; 3, anal fissure: In addition to constipation, blood in the stool, if the anal pain during defecation and tearing sensation, pain after the stool lasts for a long time, you need to consider the possibility of anal fissure. In addition to sitz bath to relieve the condition, you need to ensure regular and smooth bowel movements in daily life, and should consume more dietary fiber and nutrients; you can also use external hemorrhoid cream to promote the healing of fissures, and surgical treatment is needed when the condition is serious; 4. Intestinal lesions: such as colorectal tumors. If the patient is constipated with blood, accompanied by weight loss, abdominal mass, fever and other symptoms, the disease is generally performed tumor resection in the early stage, and later requires adjuvant chemotherapy for rescue. In addition, colitis and colon polyps may cause constipation with blood in the stool. Therefore, if constipation with blood in the stool occurs, it is recommended to seek medical attention in time to identify the cause.