What We Know about Why We Itch

From dogs to giraffes, humans aren't the only ones who know the glorious relief that comes from scratching an itch. But the science around itchiness is still kind of hazy. Especially when it stems from skin diseases like psoriasis or eczema, which each affect more than 3 million people in the U.S. yearly. To try and get experts on the same page, researchers at the Washington University School of Medicine's aptly named Center for the Study of Itch, published a review of work that's been do