I never had any pain. They hollow out an area about the size of the BAHA to remove hair and allow the screw to project beyond the remaining flesh. Mine was done with a straight line incision rather than a flap that gets folded back, stripped and then sewn back in place. I suppose with the straight incision they still have to hollow out the flesh, and they must have severed some nerves around the site. Mine was done in July 2010, and my head was numb for about a 5" radius around the surgery site. The nerves are still reconnecting, and I still have some small areas that are still numb. No pain, but it is like going to the dentist and not feeling your jaw for two hours. I'm sure all of my nerves will eventually return to normal. So, if you are still numb from your AN surgery, this will just piggy back right on top of that. You will enjoy the BAHA. I just had dinner in a noisy restaurant last night, tuned my BAHA down to a comfortable level, and enjoyed the conversation among 6 people. I know some people have had problems getting there BAHA programmed to fit their needs, but I guess I lucked out...mine is set up just right. The only time I turn mine off when I wear it, is in the car. It picks up the road/tire noise and I turn it off then. Technology is wonderful! Good luck to you.