Have you been experiencing itching, rashes or hives since changing your diet? Have you had no luck in identifying an allergen or trigger despite elimination diets and eating clean? If you have recently switched to a low carb diet, it is very possible that you are experiencing an allergic reaction, though you might not be allergic to individual items, it might be a little more complicated than that.
Something I recently discovered, which surprised me, is that people can be histamine intolerant. Many people aren't aware that histamine is present on all our food, even the fresh, natural produce and meat you buy from your local supermarket. Not only can ingredients contain histamine, but some liberate histamine already present in the body.
Histamine is a compound that is produced by our bodies as well as by the bacteria that grows on our food as it ages. It is released when there is inflammation or an allergen introduced to the body. It has healing properties, but some people are sensitive to it. Anybody who has ever suffered from seasonal allergies will know what that feels like.