Hemorrhoids - Overview
Rectal lump; Piles; Lump in the rectum
Definition of Hemorrhoids:
Hemorrhoids are painful, swollen veins in the lower portion of the rectum or anus.
Causes, incidence, and risk factors:
Hemorrhoids are very common, especially during pregnancy and after childbirth. They result from increased pressure in the veins of the anus. The pressure causes the veins to swell, making them painful, particularly when you are sitting.
The most common cause is straining during bowel movements.
Hemorrhoids may be caused by:
- Straining during bowel movements
- Sitting for long periods of time
- Anal infections
- Certain diseases, such as liver cirrhosis
Hemorrhoids may be inside or outside the body.
- Internal hemorrhoids occur just inside the anus, at the beginning of the rectum. E
- External hemorrhoids occur at the anal opening and may hang outside the anus.
- Reviewed last on: 5/16/2011
- 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., Inc.
Sneider EB, Maykel JA. Diagnosis and management of symptomatic hemorrhoids. Surg Clin North Am. 2010 Feb;90(1):17-32, Table of Contents.
Nelson H, Cima RR. Anus. In: Townsend CM, Beauchamp RD, Evers BM, Mattox KL, eds. Sabiston Textbook of Surgery. 18th ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 51.
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