Histamines, a natural part of your immune system, are released as a reaction to help rid substances that your body perceives as foreign.
However, if you are a person with food sensitivities or environmental sensitivities, you may have an overactive histamine response (overactive defense system), also called Histamine Intolerance or HIT.
Histamine Intolerance is mainly caused by an imbalance of histamine intake and the capacity for histamine metabolism and degradation.
If you have too much histamine in your body it can contribute to annoying symptoms like runny nose, red eyes, itchy skin or hives. Or, your body might respond with more serious stomach pain, diarrhea, nausea, sleep difficulties, or even migraine headaches.
For a comprehensive view of histamine triggers and symptoms, see the flow chart on Histamine Intolerance & Mast Cell Activation, below.