A pile, also known as hemorrhoid, is a mass of tissue that contains dilated and thin-walled veins, as well as extra growth that develops in the inner and external area of the anus. Internal piles occur when there is excessive inflammation between 2 and 4 millimeters (cm) above the orifice of the anus. Internal piles is the most common form. External piles occur when anus veins get dilated under the skin around the anus.
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