I have been experiencing zaps since few months ago. I would describe them as lightning going at a fraction of a second on the left side of my head.I had an MRI last year,before the zaps,and everything was fine.No tumor,aneurysm,or stroke. I also have low blood pressure. I take midodrine as needed, not every day. I take sumatriptan and naproxen when I get the migraine.I'm highly allergic.I quit gluten and I was free of migraine for several months. Last November the migraine came back and I have headaches between 8- 11 days a month.I quit eggs last week and I haven't had a headache since last week.I have two questions :1. Have anyone experienced zaps? 2. Can low blood pressure a trigger for migraine? BTW, my neurologist told me that low blood pressure is not a trigger.I have to say the zaps are a little bit painful when they pass through the head.