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Hemorrhoids are painful, swollen veins in the lower portion of the rectum or anus.

Rectal lump; Piles; Lump in the rectum

This condition is very common, especially during pregnancy and after childbirth. Hemorrhoids result from increased pressure in the veins of the anus. The pressure causes the veins to bulge and expand, making them painful, particularly when you are sitting.

The most common cause is straining during bowel movements. Hemorrhoids may result from constipation, sitting for long periods of time, and anal infections. In some cases they may be caused by other diseases, such as liver cirrhosis.

Internal hemorrhoids occur just inside the anus, at the beginning of the rectum. External hemorrhoids occur at the anal opening and may hang outside the anus.

Symptoms of hemorrhoids include:

• Anal itching
• Anal ache or pain, especially while sitting
• Bright red blood on toilet tissue, stool, or in the toilet bowl
• Pain during bowel movements
• One or more hard tender lumps near the anus

A doctor can often diagnose hemorrhoids simply by examining the rectal area. If necessary, tests that may help diagnose the problem include:

• Stool guaiac (shows the presence of blood)
• Sigmoidoscopy
• Anoscopy

Most treatments are effective, but to prevent the hemorrhoids from coming back, you will need to maintain a high-fiber diet and drink plenty of fluids.

The blood in the enlarged veins may form clots, and the tissue surrounding the hemorrhoids can die. Hemorrhoids with clots generally require surgical removal.

Severe bleeding may also occur. Iron deficiency anemia can result from prolonged loss of blood. Significant bleeding from hemorrhoids is unusual, however.

Call for an appointment with your health care provider if hemorrhoid symptoms do not improve with home treatment. You should also be seen if you have rectal bleeding. Your provider may want to check for other, more serious causes of the bleeding, especially if you have never bled from hemorrhoids before.

Call 911 if blood loss is significant or if you feel dizzy, lightheaded, or faint.

Avoid straining during bowel movements. You can help prevent hemorrhoids by preventing constipation. Drink plenty of fluids, at least eight glasses per day. Eat a high-fiber diet of fruits, vegetables, whole grains. Consider fiber supplements.

American Gastroenterological Association medical position statement: Diagnosis and treatment of hemorrhoids. Gastroenterology. 2004 May;126(5):1461-2.

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