Two summers ago I got a rash which started around the edges of my lips and spread. I was in ER twice and Urgent Care once, saw many different doctors and all gave different diagnoses. My face and neck were horribly swollen, itchy, and every part scaled off like dandruff, even my eyelids. This lasted months. I had to wear a mask when I went out from embarrassment.

I tested for everything, use nothing with fragrance. My IGe was high. Last Fall I even had a scratch test. Nothing. I'm allergic to nothing, but doctors say I have "allergic dermatitis." It comes and goes at will.

BTW, I've been eating to ketosis since 1972 and had never had the allergies (hives) before. Guess you're not alone.