Hemorrhoids »
What are hemorrhoids?
A precise definition of hemorrhoids does not exist, but they
can be described as masses or clumps ("cushions") of tissue within the anal
canal that contain blood vessels and the surrounding, supporting tissue made
up of muscle and elastic
fibers. The anal canal is the last four centimeters through which stool passes
as it goes from the rectum to the outside world. The anus is the opening of the
anal canal to the outside world.
Although most people think hemorrhoids are abnormal, they
are present in everyone. It is only when the hemorrhoidal cushions enlarge that
hemorrhoids can cause problems and be considered abnormal or a disease.
Prevalence of hemorrhoids
Although hemorrhoids occur in everyone, they become large and cause problems in
only 4% of the general population. Hemorrhoids that cause problems are
found equally in men and women, and their prevalence peaks between 45 and 65
years of age.
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