M.D., is Chief of the Division of Clinical Immunology and Allergy at Beth Israel Medical Center in New York. He is also an Associate Clinical Professor of Medicine at the Albert Einstein College of Medicine. Dr. Rubin, a graduate of Columbia College and New York Medical College interned in New York at Mt. Sinai Hospital and took specialty training in internal medicine at Beth Israel and an Allergy Fellowship at the Jewish Hospital of Brooklyn. Histamine is a cell mediator usually involved in the inflammatory response.
Histamines tend to dilate blood vessels.
This is what occurs when you get a runny and congested nose. Allergies have a genetic connection, which we do not yet understand. However, allergies can occur at any point during the life cycle - to the young and old. If your question was not addressed, please click here.