What is anaphylaxis?

All allergic reactions are caused by the immune system in your body. The immune system’s job is to fight off things that could make you ill. However, in some people the immune system makes mistakes and thinks that a type of food or another substance is harmful. The body starts to fight off this substance or allergen and the person has an allergic reaction.

Sometimes, an allergic reaction causes annoying things like itchiness or a runny nose. But sometimes, it can cause more serious problems like a ‘puffy’ face, a swollen tongue, and finding it hard to breathe.

This severe type of allergic reaction is called an anaphylactic reaction.