What causes a hematoma?

Trauma is the most common cause of a hematoma. When people think of trauma, they generally think of car accidents, falls, head injuries, broken bones, and gunshot wounds. Trauma to tissue also may be caused by an aggressive sneeze or an unexpected twist of an arm or leg. When a blood vessel is damaged, blood leaks into the surrounding tissue; this blood tends to coagulate or clot. The greater the amount of bleeding that occurs, the larger the amount of clot (hematoma) formation. Continue Reading

Reviewed on 9/17/2015
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