Acute injuries result from a singular incident. It may be a strain or sprain. This injury may stem from a fall, a collision, or simply contorting the body into an unnatural position. Acute injuries generally lead to sudden pain in the affected area.
Chronic injuries, on the other hand, are built up over time. These injuries result from continual improper use, or simply from overuse of a certain body part. Often, symptoms include swelling and lasting pain.