This has been going on since I was a child and at first I thought it was a texture thing but sometimes I go by the bakery in a grocery store while they’re making cakes or doughnuts and just the SMELL of it makes it tingly and tickly. Am I still human?
Well, as others have said, it’s more likely to be a mild allergy with that specific presentation. Check with a doctor if you can, food allergies are no joke.
However, sugar can cause an unusual sensation in high concentrations.
First, it’s hygroscopic. It pulls water to itself. Second, it can absorb through mucous membranes. Third, even in baked goods, it has a crystalline structure.
When it’s mixed in at low concentrations, it would be unusual to have any sensations associated with the product being sweet from sugars (as opposed to artificial sweeteners).
But at high concentrations like in icing? Yeah, you can have lingering sensations just from sugar doing its thing to the cells at the surface of your mouth.
I wouldn’t think to describe it as itchy, and never tingly, but I’ve experienced a tickly, kind of irritated sensation before, enough so that I went looking for what it might be.
You can test it by creaming a small amount of sugar in a small amount of butter and eating it. If it produces the effect, it’s likely the culprit. If it doesn’t, talk to your doctor because you really don’t want food allergies going undiagnosed.