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An allergy is an immune system overreaction to a substance that would otherwise pose no harm. Doctors may use a physical examination, skin tests, and blood tests to diagnose allergies. Different types ...

The stuffy nose. Eyes so watery or itchy you can't see straight. And that's just the start. Here's what you should know about ...

Some people may have an allergy to chocolate. Because chocolate has a variety of ingredients, the allergic reaction could be due to any one of them. In this article, we discuss the causes of chocolate ...

What Is a Sesame Allergy? A sesame allergy is a food allergy to sesame seeds or sesame oil, which come from the sesame plant. When you have this allergy, your immune system reacts to sesame as though ...

Wondering if your nagging cold is actually an allergy? Or what about your new skin cream that made your hands break out? Distinguishing an allergy from a non-allergic condition is not always a ...

If you’re wondering: Can allergies cause a fever? You’re not alone—there are lots of myths about allergies, and allergy symptoms causing a high body temperature is one of them. Allergies can cause a ...

An allergy involves a mild to life threatening immune response to an external substance. A sensitivity, on the other hand, is typically a milder reaction associated with difficulty digesting food. An ...