There's a reason why you almost always hear asthma and allergies mentioned together in the same breath. It's because allergies are the underlying basis for the majority of cases of asthma, especially in children. But adult asthma is also frequently related to allergies.

Experts talk about the "Atopy Triad". Atopy is a fancy medical term meaning, basically, a state of hypersensitivity (or allergy) to environmental allergens. The triad refers to 3 allergic diseases that often go hand in hand:...