Very tight sensation/burning in legs while running
I have been having this pain in my lower legs while running for about the past year and I cannot figure it out. I am a pretty slow runner (10-11 min miles) and have been running short distances (2 miles or less) so I know it isn't overexertion. After about 3-4 minutes of jogging, the muscles running down the outside/front of my lower legs from the knee to my foot get extremely tight and start to burn - its hard to describe....its just mostly a really tight feeling. I stretch before running and every 5 mins or so, but it doesn't really help. It gets so tight I have to stop and it hurts to even walk, but then 20 mins later there is no pain/tightness anymore.
I have wondered if I am experiencing shin splints, but I have tried all the stretches and reduced my speed/distance like they suggest if that's the case and it hasn't helped. Does anyone know what might be causing this and what I can do to get rid of it?