49-year old female. I have started running over the past month. I have been having pain in my lower left leg for about 3 weeks now. It started just below and to the outside of my knee, however the pain has traveled to different parts of my lower leg, including along the outer shin and to the front of my ankle/top of my foot. When I awaken or after I've sat still for a while I walk with a pronounced limp. This goes away after I walk for 10-15 minutes, then I can walk normally and start to jog slowly. I haven't been the to doctor yet because the pain has not stayed in one place consistently. Any ideas about what is going on?