In certain cases, as in pregnancy, they are caused by obstruction of the flow of blood in the veins of the rectum. Other causes of hemorrhoids include constipation, straining to have a bowel movement, lack of dietary fiber, obesity, heavy lifting, and athletic exertion. Whatever the cause, the first symptom of hemorrhoids may be bleeding from the anus, particularly during a bowel movement. Bleeding may be severe, or only a slight trace of blood may be seen on the toilet paper. Pain, swelling, irritation, and itching also commonly occur.
Hemorrhoids are very common.
They are not dangerous, although they can be very annoying and painful. However, though bleeding is a common symptom of hemorrhoids, it can also be a sign of cancer of the rectum or colon. Therefore, it is recommended that you see a physician at the first sign of anal bleeding. For treatment of hemorrhoids, the American Medical Association recommends a diet consisting of plenty of fruit, vegetables, bran cereals, and whole grain breads. Also drink plenty of water and other liquids, including prune juice.