This is something that has bothered me for several years. Occasionally when I eat, I would start sweating, mostly near the top of my head. This only happens sometimes, seemingly with certain foods but I haven’t been able to figure it out. I’ve asked my primary doctor and dialysis nutritionist and neither have a definitive answer.
If you search Google, typically it comes back with gustatory sweating. However, I don’t sweat all the time and definitely not when I think about food. Some website do say that sweating when eating could be related to diabetes so maybe I have a mild form of this secondary hyperhidrosis. It’s a bit bothersome but not enough to keep me at home and away from eating out. Usually wiping with one or two napkins is enough to remove the moisture.
Found some research articles. The sweating seems to be a rare complication of diabetes. Of course I would have it.
Life with chronic diseases 
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