My Gamma knife was November 10th, 2016 for a small but deep left temporal AVM. I had a couple followup MRIs and then an Angio in February 2019 where I got the all clear and no abnormal blood flow in the area. The waiting was really difficult off the start but became easier as time passed.
I had some head aches a few months after, around the 6 month mark which is not uncommon as I understand. That is when the radiation really gets going and caused some swelling. Some have to undergo a course of steroids in and around this time, I didn’t. I experienced something referred to as “ice pick” headaches as well, sometimes several times a day where there was a sharp pain, like an ice pick, that would last a short period of time and then disappear. Scared me a lot off the start as I thought I was having another bleed, but got used to it quickly and they slowly subsided and disappeared all together. I do still have pulsatile tinnitus, a pulse in my ear, but am told it is not due to the AVM. I only hear it when really quiet usually in bed. I pay attention to it for changes but really have noticed nothing change so am going with it for now.
I hope my experience helps you out a little, and do know that some of our folks here have had much more severe headaches than I experienced. Take Care, John.