I'm sure glad I don't have those fuggers anymore. There was a period when U=I was having them. It was purely a dietary/allergic reaction thing for me. I became sensitive, then allergenic to the pollen of several plants only growing there basically. That made me sensitive to sulfates. Ingestion of sulfates would trigger a migraine.
I seldom have headaches, so this was a rude awakening. The combo also screwed with my breathing too. This was pretty bad for a big ol guy in my physical condition at the time. They first thought I had a brain tumor. Luckly Arnold was right, it was not a tumor!
Hopefully it's just a migraine and not covid.