I have had headaches both before and after my AN surgery and my gp doctor and my neurosurgeon both told me they are not an related. I have pressed the issue though, and was told to go to the headache clinic in the city, which i never did, but tried many different meds through another neurologist and nothing I tried was helping. I would eventually end up with rebound headaches from any pain meds and the other things, beta blockers, and meds like topomax (however they are classed) honestly never really helped me. I also have complained of constant, daily, headaches only to have it dismissed. Guess I should be pressing harder about. Just been dealing with it because messing around with different meds is sometimes more trouble than it's worth. I did find that an ice pack on my head helps immensely but I would look kinda weird walking around like that and it's not fun on your butt all the time cuz of headaches. So far I'm just dealing, time will tell.