Can you be allergic to smells?

Even where the most severe allergies are concerned, the mere smell of the offending substance alone cannot trigger an allergic reaction. The proteins responsible for the body’s response are not transmitted by the aroma. For example, allergy sufferers are able to smell peanut butter without having to worry about hives or breathing difficulties. It’s only when certain foods are cooked that a large quantity of the protein particles from the food become released into the air, and inhaling these molecules could result in an allergic reaction.