i have been getting severe headaches for the last 4 years alwasys on the left side of the head by the eye and temple they come on almost straight away and last for about an hour then go almost immedieatly most of the time making me sick the pain is unbareable i dont no what causes them what they are and how to stop them please help

Optional Information:
Male , Age: 26

Already Tried:
cutting down on smoking and drinking stopped eating cheese