Head trauma can cause swelling inside the brain. This can lead to a
potentially deadly increase in pressure inside the skull. Head injury
also can seriously damage brain cells.
Each year in the United States, head injuries and brain trauma
result in more than 1 million emergency room visits and more than
50,000 deaths, according to the National Institute of Neurological
Disorders and Stroke (NINDS). In addition, approximately 230,000
people are hospitalized for traumatic brain injury in the U.S. and
survive. The most common causes of head trauma are auto and motorcycle
accidents, falls, and violent assaults.