Does anyone have any ideas about how to manage riding headaches? I believe there are 3 factors contributing to the headaches; helmet, heat and glasses.

Can't do much about the heat, but we hydrate well along the way.

I think I fixed the problem with glasses today. I didn't have proper riding glasses that were wide enough to not be staring at the top of the frame the whole ride. It was ok until the headache set in but then it exasperated the problem.

I believe the ultimate source is my helmet. Riding without one is not an option. It seems to fit well. But, after about an hour the headache sets in. I 'dialed' it down to reduce the tension but then as I went over bumps it would bounce around; that didn't seem right so I tightened it back down. I had the same problem with motorcycle helmets.

Anyone have any suggestions?

Thanks.