Pictures of Internal Hemorrhoids

Internal Hemorrhoids
Often described as "varicose veins of the anus and rectum", Hemorrhoids are enlarged, bulging blood vessels in and about the anus and lower rectum. There are two types of Hemorrhoids: external and internal, which refer to their location. 

External (outside) Hemorrhoids develop near the anus and are covered by very sensitive skin. If a blood clot develops in one of them, a painful swelling may occur. The external Hemorrhoids feels like a hard, sensitive lump. It bleeds only if it ruptures. 

Internal (inside) Hemorrhoids develop within the anus beneath the lining. Painless bleeding and protrusion during bowel movements are the most common symptom. However, an internal Hemorrhoids can cause severe pain if it is completely "prolapsed" - protrudes from the anal opening and cannot be pushed back inside.


What Causes Hemorrhoids?
An exact cause is unknown; however, the upright posture of humans alone forces a great deal of pressure on the rectal veins, which sometimes causes them to bulge. Other contributing factors include:

• Aging
• Chronic constipation or diarrhea
• Pregnancy
• Heredity
• Faulty bowel function due to overuse of laxatives or enemas; straining during bowel movements
  Spending long periods of time (e.g., reading) on the toilet 

Whatever the cause, the tissues supporting the veins stretch. As a result, the veins dilate; their walls become thin and bleed. If the stretching and pressure continue, the weakened veins protrude.

Rubber Band Ligation of Internal Hemorrhoids 
A. Bulging, bleeding, internal Hemorrhoids
B. Rubber band applied at the base of the Hemorrhoids
C. About 7 days later, the banded Hemorrhoids has fallen off leaving a small scar at its base (arrow).

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