Whenever I eat something with a lot of vinegar in it, my face gets kind of sweaty and hot. I wouldn't really consider it an allergy, because I eat it anyways and I don't ever get sick. It stops as soon as I stop eating whatever it is. It happens with hot sauce a lot and some types of salad dressings.
It's allergies. Allergies affect different people different ways to differing degrees, sounds like you may have a mild allergy to vinegar or something in vinegar. What ya have to watch out for is a constant combination of different allergy exposure over a long period of time, it's then when the immune system is overwhelmed, that's what happened to my wife a couple of decades ago, suddenly all those in control allergies that had not manifested themselves suddenly exploded on her.
At the time we were living in a two story townhouse with cement slab floors, the downstairs duct work was run through the slab, a perfect mold breeding environment......... It turns out mold is her worst allergy, the Doc said he'd never seen such a reaction to the skin test in his 30 years of practice, took almost two months for the test site to heal.