Some people can have ankle laxity (loose) due to their foot/ankle structure or trauma can develop chronic lateral ankle instability. This is a condition which can predispose a person to chronic lateral ankle sprains, pain, and predispose them to other injuries. Lateral ankle instability occurs when the lateral collateral ligaments of the ankle become stretched or even torn. Usually the anterior talofibular ligament and sometimes the calcaneofibular ligament are involved. The posterior talofibular ligament is rarely involved.
There are conservative ways to brace the foot/ankle, but oftentimes surgical intervention is necessary. Surgery involves tightening of the stretched or torn ligaments. It also may be necessary to surgically address the bony structure of the foot/ankle in order to prevent recurrence of the deformity.