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Conditions and Diseases > Digestive and Bowel Disorders Forum > Anal Lump - dark colored lump in anus hurts on touch
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Q: Anal Lump - dark colored lump in anus hurts on touch
asked by: meteorhavana on November 14th, 2007
New User
yesterday out of nowhere i just noticed a dark colored lump in my anus that hurts when i touch it. i was wondering if anyone has heard of this
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Marianne0558
replied on November 14th, 2007
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What you describe is a perianal haematoma, or external pile. Despite this name, it is not actually a pile at all, but is really like a blood blister such as you get on your thumb if you trap it or hit it with a hammer.

What causes a blood blister in this situation is that when the bowels are opened the anus stretches, and sometimes a tiny blood vessel will rupture and cause a leak of blood just under the skin. It raises a pea-sized swelling right on the margin of the opening of the anus. It is very tender at first, because the skin is stretched over it in this very sensitive region, and when it is further stretched by passing a stool, it is even worse.

Most of these haematomas do not need any treatment.
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