Brown spots, or hyperpigmentation, don't show up on just naturally freckle-prone people -- they can form on any type of skin during any time of year. But one thing is for sure: they tend to pop up most in the summer, when the sun's skin-damaging rays are abundant.
In the video above, Us Weekly asks NYC-based dermatologist Dr. David Colbert, who has treated the faces of Rosie Huntington-Whiteley and Rachel Weisz, how to prevent dark spots from appearing in the first place, plus what to do when a new one forms.
Dr. Colbert warns that if you see a new dark spot, or an existing one that has an altered appearance, head to your dermatologist to check it out. That kind of sun-care safety plus wearing SPF 30 daily (and reapplying it throughout the day) should help keep spots at bay.