When constipation bleeding in the stool may be caused by dry stool rubbing the rectal mucosa, you can take oral lactulose to relieve constipation or use open plug to help defecate. It may also be hemorrhoids, anal fissures, rectal cancer, other causes of bleeding, you need to seek medical attention in a timely manner to clarify the cause of treatment. Common causes and treatments 1, hemorrhoids: constipation, abdominal pressure increases rapidly, easily causing hemorrhoids rupture and bleeding, accompanied by perianal itching, pain and prolapse and other symptoms, patients can choose warm water bath, manipulation reset and other methods of treatment, or local use of antispasmodic drugs, glucocorticoids and so on to improve the pain symptoms; 2, anal fissure: due to the anal canal skin layer cracks formed small ulcers, patients in constipation, defecation can Patients may experience pain, blood in the stool, itching and other symptoms. Patients can be treated with local vasodilators and calcium channel blockers under the guidance of doctors, usually with potassium permanganate baths, and endoscopic sclerotherapy or surgical treatment when the bleeding is large; 3, rectal cancer: because the surface of the tumor itself breaks down, it constantly bleeds or oozes blood, and the fecal mass brings it out when defecating, and some patients can also have symptoms such as increased number of stools and anal swelling. The diagnosis can be confirmed by rectal examination, proctoscopy and abdominopelvic CT, and patients need to be treated by surgery and chemotherapy. 4. Caution usually pay attention to eat less spicy, fried, greasy food, drink more water, eat more celery, corn, buckwheat and other dietary fiber-rich food. Develop regular bowel habits, appropriate exercise to promote intestinal peristalsis to relieve constipation and improve symptoms.