Re: glasses/sunglasses

If you usually wear glasses, you may be straining w/o noticing it, so eyestrain could be part of it. If it's bright, and you don't have on sunglasses, that might influence it. My eyes are sensitive to the light.

Next time your riding, reach up to your neck and feel the tendons. Are they tight and painful? What about your jaw? Are you clenching your jaw shut w/o noticing? That could cause tension headaches.

I have more headaches when it's hot than when it's not, so I don't have any real answers. I'm a fifth-generation Texan and I still can't handle the heat, so while I do believe in evolution, I don't think it's moving very fast in my genes!