I have had a lot of pain in my left leg that just started today. I cannot think of any strain or injury that would be causing it. I did fall asleep sitting in my easy chair last night and worked mostly at my desk for several hours. Since then I have had difficulty walking and the pain increases when I first get up and walk but then subsides. It also seems to be hurting while lying down. I do not know if I should be seriously worried or this might just be where I slept wrong in the chair!