The brain can swell, a bruise can occur on the brain's surface, or bleeding can occur in or around the brain. The blow to the head is usually sudden and forceful. Examples are a fall to the ground, a punch to the head, or a car accident. Most people with a concussion recover completely. Repeated concussions may lead to damage that may last for a long time.
Some children have no immediate symptoms, but grow sluggish and moody within a few hours.
Some of the symptoms may persist for several weeks. Treatment can ease some symptoms, but the concussion must heal on its own. If you suspect a concussion, go directly to your healthcare provider or hospital emergency room. You could have a skull fracture or you could have bleeding inside the skull. After an injury to the head, you should follow a few safety steps for several days.