An allergic reaction happens when your immune system defends against substances that otherwise wouldn’t pose a threat to your body. Common allergens include pollen, mold, and certain foods. Your ...

What Is a Peanut Allergy? You have a peanut allergy when your body’s immune system overreacts to peanuts. Normally, your immune system helps protect you from germs and other harmful substances. But if ...

But their options are expanding like never before as a wave of new research and therapies are “moving beyond a ‘one-size-fits-all’ approach,” says DeVon Preston, an allergist at Cleveland ...

Experts say it's possible for people to develop seasonal allergies as they age.

Get inspired by a weekly roundup on living well, made simple. Sign up for CNN’s Life, But Better newsletter for information and tools designed to improve your well-being. The arrival of spring is ...

If you experience wheezing, breathlessness, or persistent coughing spells, especially after being around dust, pets, or pollen, you could be dealing with more than just allergies. These symptoms may ...

Many people believe they have a penicillin allergy, but up to 90% are not actually allergic. Side effects like nausea are often mistaken for a true allergic reaction. An allergist can perform tests to ...

Hours after savoring that perfectly grilled steak on a beautiful summer evening, your body turns traitor, declaring war on the very meal you just enjoyed. You begin to feel excruciating itchiness, ...

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 ...

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 ...