They spring clean their cosmetics
When in doubt, toss it out. There are no FDA regulations for skin-care product expiration dates, but it is important to be vigilant about swapping out products regularly (because they do have a shelf life). “Go through your cosmetics, products, and sunscreens, and toss the things that have been around a little too long,” says Whitney Bowe, MD, a board-certified dermatologist and assistant clinical professor of dermatology at Mount Sinai Medical Center. Remember this rule of thumb: Anything you apply near the lips or eyes should be tossed after a year. Also, throw your dingy makeup bag in the washer. If it can’t be laundered, clean with antibacterial cleanser.
They exfoliate more
“Just like you clean up your winter wardrobe, clean up your winter skin,” says Doris Day, MD, a dermatologist based in New York City and clinical associate professor of dermatology at NYU Langone Medical Center. “Bring out its brightness by exfoliating a little more in the spring.” In the winter, when your skin is drier and more sensitive (thanks, whipping winter winds and dry indoor heat), it’s best to exfoliate just once a week. But in the spring, exfoliation removes old layers of skin and helps topical treatments absorb into the skin better. Most skin types can increase exfoliation to twice a week. If you notice dryness, redness, or sensitivity, decrease how often you exfoliate or ask your dermatologist which exfoliation method might work best for you.