Health Library

A head injury is a broad term that describes many injuries that occur to the scalp, skull, brain, and underlying tissue and blood vessels in the head. Head injuries are also commonly referred to as brain injury, or traumatic brain injury, depending on the extent of the head trauma.

A head injury can be as mild as a bump, bruise (contusion), or cut on the head. Or it can be a concussion, a deep cut or open wound, broken skull bones, internal bleeding, or damage to the brain. Head injuries are one of the most common causes of disability and death in children.

Head lice are tiny parasitic bugs that can infest the skin. They live on people’s heads and feed on their blood. Head lice can cause intense itching.

True or false: Head lice travel from one person's head to another's by jumping. Check out this and other answers to true-false questions about head lice.

Nearly everyone has suffered from a headache. This article discusses several types of headache, how they are diagnosed and treated.

A headache is pain or discomfort in one or more areas of the head or face. Headaches can happen once in a while. Or they may happen often.

Managing headaches is especially tricky in the first trimester. This is a time when you should stay away from many medicines.

When you get a headache, it's not the bones of the skull or the brain itself that's hurting. The pain comes from pain-sensitive nerves located near the muscles and blood vessels of the face, neck and scalp. Find out more about headaches by taking this quiz.

People who feel they can't regain control of their lives because of their responses to trauma may have posttraumatic stress disorder.