Not all hyperpigmentation is created equal, and you need to understand the cause of your spot to treat it correctly. The main culprits: sun exposure, hormonal changes, scars, and rashes.
If you have freckles across your cheeks, nose, chest, and hands, those are generally the result of sun exposure. "UV rays trigger your cells to produce excess melanin, and it shows up as dark spots," explains Miami dermatologist Heather Woolery-Lloyd, MD.
If you have clusters of spots on your forehead and the sides of your cheeks, it's most likely a condition called Melasma. "It's the result of hormonal changes that trigger pigmentation in the cells," explains New York City dermatologist Bruce Katz, MD.
"Other times, hyperpigmentation can be caused by acne breakouts or even darkening from rashes," says Katz.