Can you be allergic to apples?

Yes.: But it is more common to have a problem only with raw apple, particularly the peeling, due to oral allergy syndrome. This is caused by an allergy to birch tree pollen. Some of the proteins in the apple peel are similar enough to birch tree pollen proteins to cause a "cross reaction." usually this causes only mouth and throat symptoms. Talk to your allergist for more info.

Yes: Any food can potentially trigger an allergic reaction. Severe apple allergies are not common, but many people with birch tree allergy have "pollen food allergy syndrome" where eating a fresh apple leads to itchy mouth and throat. This is due to cross reactive allergen. An allergist can assess for food allergies including apple.