I've recently developed nasty stinging pain in my right foot's second and third toes (mostly the tips) about 35-40 miles into a ride. It happened today (42 miler) as well as a week ago (58 miler). I've never had this happen before. Same bike, shoes, everything. With the first episode, I thought it was because my toes were hitting the front of the toe box as I'd put on the shoes on uneven ground (gravel) and that they weren't all the way back in the shoes. So, today I made sure my heels were back before doing the straps but I had the pain again. The only thing diff now is that it is/was very hot weather-wise on those rides. What is behind this? How to remedy?