This article has been reviewed by Thanai Pongdee, MD, FAAAAI
Allergies often bring to mind sneezing, a runny nose or watery eyes. While these are symptoms of some types of allergic disease, it’s important to understand that an allergic reaction is actually a result of a chain reaction that begins in your genes and is expressed by your immune system.
What is happening inside your body when you have an allergic reaction? Read on to find out.