Exit obstructive constipation can be examined by the following ways: endoscopy, barium enema angiography, anorectal manometry, and so on. 1. Endoscopy: endoscopy is one of the most commonly used examination methods to check various organic intestinal diseases, which can observe the rectum and anal canal under direct vision to see whether there are organic obstruction factors, such as rectal polyps, rectal-anal tube mucous membrane prolapse, etc., and then determine whether there is outlet obstruction. 2. Barium enema: Barium enema can observe whether there is colonic dilatation, intestinal lumen stenosis, sigmoid colon redundancy and other organic lesions, and then determine the causes of constipation. 3. Anorectal manometry: This is to put the manometric device into the rectum, and ask the patient to contract or relax the anus, to check the perianal sphincter, pelvic floor, rectal coordination function, etc., and then determine the type of constipation with outlet obstruction. In addition to the above examination methods, exit obstructive constipation can also be examined by colon transmission test, fecal imaging, anal electromyography, etc. It is recommended that patients go to the hospital as soon as possible, consult a professional doctor and choose the appropriate examination methods.