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Jessica Wu, MD, has been practicing privately—and making house calls to Hollywood movie sets—for over 20 years. She’s appeared on Good Morning America and CNN and been featured in The New York Times, People, and The Wall Street Journal. A Harvard Medical School graduate who is often credited for her expertise and artistry, she teaches at the University of Southern California and frequently lectures at national and international medical conferences. She is a member of the American Academy of Dermatology, American Society for Dermatologic Surgery, and the Medical Council of the American Society for Nutrition.

The Difference Between Dry and Dehydrated Skin—and How to Treat Each

Your skin might be dry from the harsh winter weather, but is it dehydrated, too? Here's what dermatologists want you to know