Bruising and swelling are common signs of a sprained ankle. If there is severe tearing of the ligaments, you might also hear or feel a “pop” when the sprain occurs.
Most sprained ankles occur in the lateral ligaments on the outside of the ankle. Sprains can range from tiny tears in the fibers that make up the ligament to complete tears through the tissue.
In addition to plain x-rays, your doctor may also order stress x-rays. These scans are taken while the ankle is being pushed in different directions. Stress x-rays help to show whether the ankle is moving abnormally because of injured ligaments. Magnetic resonance imaging (MRI) scan.