I took a four hour road trip about two weeks ago, I was the driver. A few hours after returning home I felt something pop in my ankle and the pain started. it is intermitent and I can have full range and motion without pain but when i hit that one position or after walking the pain can be pretty bad. Now it has started to swell. had an xray done and it found only soft tissue swelling. If I had a sprain i dont think I could move to without pain. Here is the question could this be muscle spasms causing the pain and swelling. I have noticed in recent months my muscles are tightning more. By the way i have sever chronic pain and am on daily narcotics, will be going in for a pump in a few weeks.