An allergy is a reaction the body has to a particular food or substance. Allergies are very common. They’re thought to affect more than one in four people in the UK at some point in their lives. Allergies occur when the body’s immune system reacts to a particular substance as though it’s harmful. It’s not clear why this happens.
Our emergency departments are currently extremely busy, and you may face a long wait to be seen. More information is available on alternative services.
