This very common skin condition involves dark patches appearing usually on the face, but sometimes on the arms. It often appears on women who are pregnant, as well as women taking oral contraceptives or hormone replacement therapy. Typically the patches vanish after pregnancy or after you stop taking the contraceptive or hormone medications.

A variant of Melasma, Cholasma, breaks out on your forehead, cheeks and upper lips. This condition is common for women aged 20 to 4o, and is more common among women with dark skin.