An immediate injury. Classified as acute for the first 48 to 72 hours after the injury occurs. Ice therapy is usually recommended as first treatment for many acute injuries.

an injury resulting from a single sudden incident, eg. being struck by an object, pulling a muscle, etc.

injury resulting from single, sudden incident or trauma. Often occur from a direct blow or a fall and can result in bruises, fractures, dislocations, muscle ruptures, strains, sprains, and injuries to the ligaments and tendons.

an injury with sudden onset and short duration.