Siku, a polar bear at Lincoln Park Zoo, developed allergies to various substances including human hair dander (Credit: ...

You have atopic dermatitis, better known as eczema. According to the National Eczema Association, more than 31 million people in the United States alone experience this genetic skin condition.

A patch test for atopic dermatitis helps identify triggers and confirms diagnosis. Learn about self-testing and specialists ...

Instead of the usual tears you shed when stocking up on Supergoop sunscreen, Too Faced mascara, and Lululemon workout gear.