>Health and Nutrition>Exercise Induced Headaches
I too was getting debilitating headaches post run - almost had to quite running because of it. Finally figured it out - key to fixing my post run headaches was hydrating very well the day BEFORE the long run. I really focus on making sure I get enough water the day before the long run and hardly ever get the headaches post run now (I also make sure to hydrate well during and post run, but the key for me was day before). Hope this helps!