A health care professional may suspect that you have a sprained ankle based on the history of your injury and your current symptoms. To confirm the diagnosis, he or she will examine your ankle for:
Swelling or deformity
Inability to feel someone touching the skin
Areas of tenderness
Limitation in range of motion
Inability to bear weight
For severe ankle injuries, a health care professional may request X-rays to determine whether a bone is broken. Fractures can occur with or without a sprain and can cause similar symptoms.