A sprain describes injury to a ligament caused by excessive stretching. Ligaments are the tough, elastic-like bands that attach to your bones and hold your joints in place. Sprains occur most often in your ankles, knees or the arches of your feet. Twisting is a frequent cause.
Sprained ligaments swell rapidly and are painful.
Generally, the greater the pain, the more severe the injury. Your ligament stretches excessively or tears slightly. The area is somewhat painful, especially with movement. There is not a lot of swelling. You can put weight on the joint.