If you had been told that you would radiate a gorgeous, healthy "glow" during pregnancy, but all you've got are brown patches all over your face, you're not alone. Although melasma, also known as the "mask of pregnancy," is more likely to affect women with darker skin tones (particularly Asians and Latinas), increased estrogen levels and sun exposure make it a common pregnancy complaint for women of all shades.

Fortunately, melasma isn't dangerous and it will probably fade after you give birth and your hormone levels return to normal. But in the meantime, prevent the spots from appearing (or darkening) by wearing a sunscreen with at least SPF 15 every day and wide-brimmed hats when you're out in the sun for extra protection. Wait until after you deliver to try any skin bleaches or lighteners that contain hydroquinone, as the harsh chemicals can irritate sensitive pregnancy skin and may cross the placenta. Instead, look for products with natural or botanical ingredients, such as tea tree oil and kojic acid.