The only other acute injury seen with any frequency is a peroneal tendon dislocation. The mechanism of injury is again different than in the typical ankle sprain. Usually it's a hyperdorsiflexion injury, such as might occur when you fall over the tip of your skis. Often by the time the patient reaches a physician, the tendon has spontaneously reduced. The tip-offs here are the mechanism of injury and swelling and tenderness that extend up along the posterior border of the fibula, well proximal to the ligaments.
Patients often have swelling in and around the tendon sheath as well.
It's critical to get on top of the injury as quickly as possible. Proper use of a compression wrap is, without question, the most important measure. The goal is to prevent swelling, bleeding, and edema around the capsule of the ankle that will result in loss of motion. If you lose motion, you'll lose strength, and it's difficult for patients to regain strength and motion of the ankle. The more swelling you can prevent, the better off the patient will be.