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: 05/15/2009
Reviewed By: Todd Eisner, MD, Private practice specializing in Gastroenterology,
Boca Raton, FL. Clinical Instructor, Florida Atlantic University
School of Medicine. Review provided by VeriMed Healthcare Network.
Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M.,
A.D.A.M., Inc. is accredited by URAC, also known as the American Accreditation HealthCare Commission (www.urac.org)