Ankle sprain refers to the stretching or tearing of one or more ligaments, the tough fibrous bands responsible for keeping the ankle bones in place. They can occur as a sport injury, or as a result of an accident. Twisting, rolling and turning the feet are the movements known for causing ankle sprains. Symptoms of ankle sprains may include pain, swelling, stiffness and bruising. The occurrence of ankle sprains can be minimized with the help of adequate footwear and exercising caution on uneven surfaces.