As a chronic sufferer myself, having tried virtually all anti inflamatories, cortizone in the head, accupuncture, and kicking the cat! -(don't have a cat but it sounds good!), I am convinced that the headaches are a direct result of one thing - the surgery. The way the head is cut open, pulled about, the muscles cut, the scalp put back together etc.
My view is that we engage these surgeons who know all about the growth and how to dig it out but when it comes to the cutting, prodding etc, well, puit it this way, if your car is in an accident and the body and motor are wrecked, you send it to to different specialists - a panel beater and a mechanic. With AN's we use a "mechanic" for both jobs. Kinda like my daughters car - it needed a quick and nasty bit of rust removal and re paint to get it back on the road. the mechanic did a quick and nasty job - ok, it passed its test and is on the road but it doesn't look like a 100% job.
Personally, I don't think I'll ever get rid of these headaches, apart from the odd bit of short term relief. Sorry, but I have lost faith in the available meds.
Laz