I never thought I'd ever hear anybody else with the grinding/blending sound. I get them all! The photosensitivity, hemiparesis, nausea, vomiting, aura, but I also occasionally, usually in the middle of the night get woken up to a grinding sound in my head and it makes me very nauseated and I usually have to get up and vomit. With these the headache never actually occurs. I've also started having a painful pressure which creeps up my left arm until it gets just above my elbow and then it stops. I've been told that it is probably Jacksonian seizures and that the grinding thing is a form of seizure too that occurs in my sleep. They put me on Topamax and Relpax. Neither of which stop my migraines. I will say that if I avoid certain food additives and non-sugar sweetners I don't have as much trouble. Aspartame will trigger one every time. You may want to tell your mom to try to avoid aspartame. Unfortunately they put it in everything these days. Almost all gum, mints, and diet sodas. I wish the best for your mom.