I am 2-1/2 years post op. Before my surgery I had frequent (1-2 per month) headaches and migraines. Since my surgery I am very happy to say that I rarely get a headache, and have had just 1 migraine--until last night. Yesterday I had an executive physical, and among many, many other tests (including an audiogram, which still shows perfect hearing on my good side!), I had a vasular screening. This consists of ultrasound on various parts of your body looking for blockages or signs of an aneurysm. They spend a lot of time going up and down your carotid artery on each side of your neck. Last night and into this morning I had a migraine mostly on my affected side along with vomiting. So now I'm wondering if it could have irritated a nerve or something. I just hope I haven't unleashed a beast, because I have been quite blessed not to endure debilitating headaches, which seem fairly common after retrosigmoid surgery. Has anyone had any experience in this area?