Hi everyone, I had an avm they found 6 years ago and it had already bled. It was at the base of my skull, I had surgery a couple months afterward. Then about 18 months ago they removed my greater occipital nerve on left side. I have been good since until about 2 weeks ago and my headaches came back with vengeance. I am in a lot of pain, hard to focus and concentrate on anything. I have been in continuous pain for about a week. Anybody out there been or going through this?