Any pain in the body signifies there's a problem. It could major, it could minor. I get headaches in different spots of my head but it's due to teethaches.
I have a friend who gets migraines and when she feels one coming on she has to take codeine. And I work with another who, in the past, has had to go to the emergency room because of his migraines and get some kind of shot. I don't get them, thank god, so I can't really symphathize, I can only imagine just from the headaches I get. Did the doctors give him any medication for these migraines? If not, what are they doing for him? If nothing, then he needs to find a doctor who will listen and care. And keep going to doctors til he finds one. Good luck!