My boyfriend gets a extreme headache as soon as he gets turned on. He can be hard and not have a head ache but as soon as sex begins he gets a huge head ache and he says it’s like someone punching him in the back of the head?

We normally have sex 3 times a day but the past 2 days he can’t stop the headaches.

They last for about 3 hours

Doesn’t respond to Panadol or nurferon