Laboratory studies of blood and cerebrospinal fluid. Permanent brain damage, depending on the extent of injury. Excessive cerebral bleeding, causing a clot that puts pressure on the brain. Prolonged healing time if vigorous activities are resumed too soon. Infection if skin over the contusion site is broken.
Complications can be life-threatening or cause permanent brain damage.
Follow your doctor's instructions. These instructions are supplemental. Ice helps stop internal bleeding. Prepare an ice pack of ice cubes or chips wrapped in plastic or in a container. Place a towel over the injured area to prevent skin damage.