Injured my ankle 2 months ago right above the ankle bone is very hard and tender what is this?

Callus formation?: It may be healing bone from a fracture. Was an xray taken? http://www.merckmanuals.com/home/injuries_and_poisoning/fractures/overview_of_fractures.html

Get an xray: It could be calloused none from a healing fracture that was not seen initially, or just soft tissue swelling. See your doctor so they can order an X-ray if necessary. Hope this helps!