A head injury is any trauma to the scalp, skull, or brain. The injury may be only a minor bump on the skull or a serious brain injury. A head injury can be either closed or open (penetrating). A closed head injury means you received a hard blow to the head from striking an object, but the object did not break the skull. Most head trauma involves injuries that are minor and don't require specialized attention or hospitalization. However, even minor injuries may cause persistent chronic symptoms, such as headaches or difficulty concentrating. You may need to take some time away from many normal activities to get enough rest to ensure complete recovery. Head trauma that's associated with other symptoms of a concussion, such as nausea, unsteadiness, headaches or difficulty concentrating, should be evaluated by a medical professional. A head injury is any sort of injury to your brain, skull, or scalp. This can range from a mild bump or bruise to a traumatic brain injury. Common head injuries include concussions, skull fractures, and scalp wounds. The consequences and treatments vary greatly, depending on what caused your head injury and how severe it is. Head injuries may be either closed or open. A closed head injury is any injury that doesn’t break your skull. An open (penetrating) head injury is one in which something breaks your scalp and skull and enters your brain. It can be hard to assess how serious a head injury is just by looking. Some minor head injuries bleed a lot, while some major injuries don’t bleed at all. It’s important to treat all head injuries seriously and get them assessed by a doctor.