The common causes of anal pain with bleeding while pooping are hemorrhoids, anal fissure and sinusitis. 1. Hemorrhoids: generally suffer from internal hemorrhoids or mixed hemorrhoids patients, bleeding in the stool is a more common symptom, when the hemorrhoidal core prolapse and incarceration, there will be pain. 2. anal fissure: mainly feces is too dry and hard, in defecation, excessive force will easily lead to anal canal damage, the formation of fissure and bleeding phenomenon, the patient in defecation will have obvious pain. 3. Sinusitis: because of the presence of inflammation of the sinuses and anal valves, and the symptoms of edema, and sometimes the anal papillae will also have hyperplasia and inflammation of the phenomenon, in the acute stage, the patient in the defecation will have painful symptoms, there will be a small amount of blood, mucus, etc. with the stool discharged after the stool. It is recommended that patients go to a regular hospital in time, through the improvement of the relevant examination, to help further determine the cause of the disease, and then give effective, standardized treatment, so as to avoid the development of the disease.