Melasma, often known as “the pregnancy mask”, is a common skin problem.
It causes brown to gray-brown patches on the face. Most people get it on their cheeks, bridge of their nose, forehead, chin, and above their upper lip. It also can appear on other parts of the body that get lots of sun, such as the forearms and neck.
Melasma is caused partly by sun, genetic predisposition, and hormonal changes.