I am training for a marathon, and during my last couple long runs I've been getting a pain in my 2nd toe. It's basically on the under side of the toe, where the toe attaches to the foot. It feels like something (tendon, something?) is being pulled really tight, and kind-of creates a burning sensation. I ran 13 miles today and started feeling it about mile 5 or so. it still feels a little sore now. I was just wondering if anyone else has had anything like this or knew what it was.