Our skin is home to many tiny factories called melanocytes. They're responsible for producing the pigment that gives skin its color. But certain triggers like UV light can send those factories into overdrive, resulting in dark spots and discoloration known as hyperpigmentation. In this episode, Michelle shares a cautionary tale of some splotchy, unwanted mementos from one magical island vacation in her youth, and dermatologist Mona Gohara breaks down the best ingredients and in-office lasers to make them disappear.

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This episode of Allure: The Science of Beauty is presented by Olay.