Children often grow out of their allergies, especially if they are young when they first develop their allergy. Most children with milk and egg allergy do grow out of their allergy in childhood. But other allergies, eg nut allergy, only rarely go away as you get older.
It can be hard to predict who will grow out of their allergy, and sometimes your allergy can come back again! If you ever wonder whether or not you are still allergic to something, discuss with your health care professional may be because you have not had a problem with the allergen in years, we recommend that you discuss with your local allergy service about having repeat testing or a challenge test in hospital, rather than just trying at home to see for yourself.