I recently went to the doctor for pain in my ankle area. It comes and goes, but when it's there the pain is so terrible I can't even walk on it. The only way to describe it is like someone hit my ankle with a baseball bat. It's been like this for almost a week with no change.

I can't seem to find a trigger for the pain. I'll be walking and all of a sudden it hurts. The doctor found no swelling or inflammation. It's not bruised... it actually looks perfectly normal. I haven't started any rigorous exercise or anything, but I have been walking more than usual. Any idea what the pain could be from? The only advice the doctor gave me was to keep taking Advil.