Outer toe pain when running

I have began distance running over the last 8 months. At about 3-4 miles into my long runs my outer two toes on both feet start aching with a hot nerve like pain. Sometimes it's almost unbearable. The pain goes away almost instantly when I'm finished running and just walking around. The squeeze test on my foot doesn't produce any pain. Could this still be MN? Does anyone else have any experience with this?