Harvard Women's Health Watch
Unmasking the causes and treatments of melasma
This challenging skin condition causes dark patches on the skin that can last for years. By October, your summer tan is probably almost gone, but a glance in the mirror may still show some darkened patches on your skin that seem to be sticking around. These brown or grayish-brown blotches, typically on the forehead, chin, cheeks, upper lip, or nose, may signal a condition called melasma.