His headache was still sitting over his right eye as if it had been nailed there.

I didn't feel physically sick. But mentally. My mind was twisting in so many ways. (...) We once saw a documentary on migraines. One of the men interviewed used to fall on his knees and bang his head against the floor, over and over during attacks. This diverted the pain from deep inside his brain, where he couldn't reach it, to a pain outside that he had control over.