On rides of 50+ miles I have on several occasions experienced pain on the top of my thigh(s) similar to numerous bee stings. I don't feel any pain until I accidentally brush my thigh or rest my hand on it, then major burning pain comes on. It's not proceeded or followed by cramping and typically occurs near the end of the ride,disappearing as quickly as it occurs. I try to stay hydrated and consume energy drinks and food during the ride. Anyone else experience this pain? Any suggestions on avoiding it?