Acute Ankle Sprain
A sprain is a stretching or tearing of one or more ligaments, the tough fibrous bands that hold the ankle bones in place. Sprains can be caused by a sports injury, accident or stepping on an uneven surface. Symptoms may include pain, swelling, stiffness and bruising. There may be a popping sound when the ankle is moved. The ankle may be unstable or unable to hold weight.