Hemorrhoids

The most common causes of hemorrhoids are straining at bowel movements, prolonged sitting and pregnancy. Internal hemorrhoids occur above the anal sphincter, and external hemorrhoids occur below, outside the anal canal.




Review Date:6/10/2005
Reviewed By: Joseph P. Hart, MD, Division of Vascular Surgery, Department of Surgery, Medical College of Wisconsin, Milwaukee, WI. Review provided by VeriMed Healthcare Network.