1. Bruises of Hemophilia
A bruise is a common skin injury that results in a discoloration of the skin. Blood from damaged blood cells deep beneath the skin collects near the surface of the skin, resulting in what we think of as a black and blue mark.

Causes of a Bruise
People typically get bruises when they bump into something or when something bumps into them.
-- Bruises can occur in some people who exercise vigorously, such as athletes and weight lifters. These bruises result from microscopic tears in blood vessels under the skin.
-- Unexplained bruises that occur easily or for no apparent reason may indicate a bleeding disorder, especially if the bruising is accompanied by frequent nosebleeds or bleeding gums.
-- Often, what are thought to be unexplained bruises on the shin or the thigh, for example, actually result from bumps into a bedpost or other object and failing to recall the injury.
-- Bruises in elderly people frequently occur because their skin has become thinner with age. The tissues that support the underlying blood vessels have become more fragile.
-- Bruises are also more common in those taking medicine to thin the blood.

Symptoms of a Bruise
-- Initially, a fresh bruise may actually be reddish. It will then turn blue or dark purple within a few hours, then yellow or green after a few days as it heals.
-- A bruise is commonly tender, and sometimes even painful for the first few days, but the pain usually goes away as the color fades.
-- Because the skin is not broken in a bruise, there is no risk of infection.