Cookie Notice

This site uses cookies. By continuing to browse this site, you are agreeing to our use of cookies. Review our cookies information for more details.

OK
skip to main content

Histamine Defined

Histamine is a chemical released by mast cells in the immune system when the body encounters an allergen. This causes an allergic reaction.

Learn more about allergies and allergic reactions.

The AAAAI's Find an Allergist / Immunologist service is a trusted resource to help you find a specialist close to home.