There are two types of sex headaches: 
A dull ache in the head and neck that intensifies as sexual excitement increases
A sudden, severe, throbbing headache that occurs just before or at the moment of orgasm
 In some people, both types of headaches are combined. Most sex headaches last at least several minutes. Others may linger for hours or even 2 to 3 days. Many people who have sex headaches will experience them in clusters over a few months, and then they may go for a year or more without having any. Up to half of all people with sex headaches experience them over the course of about six months. Some people may only have one attack during their lives.