I recently developed deep muscle soreness and pain in my right leg. It not a sharp pain but a dull throb that gets worse when I am sitting. It started in my right butt, then the hamstring (but more on the side under the IT band) and now has settled in my lower calf. I am also experiencing a lot of stiffness and loss of range of motion. I've had many muscle pulls and overuse soreness but this doesn't feel the same and it is not getting better. I'm starting to get worried - anybody out there experience something similar?