Hemorrhoids are swollen blood vessels that are found in and around the anus and lower
rectum. They can be internal, which means inside the anus. Or, they may be external, which means they are found
outside the anus.
What is going on in the body?
The blood vessels around the anus swell and may bleed or
cause other symptoms. The exact cause of hemorrhoids is not always clear.
What are the causes and risks of the condition?
Hemorrhoids are related to dilated blood vessels, but the exact cause is not always clear. Some types of
hemorrhoids run in families. Other factors that increase your risk for
cancer of the rectum or colon
a diet that lacks fiber
liver disease, such
loss of muscle tone in the rectum due to aging and rectal surgery
jobs that require standing or sitting for long periods of time
straining due to constipation