There seem to be two basic patterns to these headaches: Type 1 usually begins as a dull pain that starts prior to orgasm, while type 2 has sudden onset, often described as a “thunderclap” headache, that occurs within seconds of orgasm.
I actually had these for several weeks a couple of years ago. For about four weeks straight, any kind of arousal or sexual activity (luckily I was single at the time) caused me to have blinding, incredibly painful headaches. I ended up locking away all my toys, books and anything else remotely sexy for several weeks. I was terrified it was going to last forever, but seemed such a strange thing to go to a doctor about – I figured they’d assume it was psychosomatic and send me to a shrink.
Eventually, it went away, and I’ve never (touch wood) had trouble since, but I had no idea this was a real medical thing that other people went through, too.
It’s comforting to know it’s more common than I realized!