Melasma is a common skin problem that causes brown to gray patches on sun exposed areas, usually on the face. In most cases the cheeks, bridge of the nose, forehead, chin, and above the upper lip are the affected areas. Women experience melasma more often than men, and it is very common during pregnancy (pregnancy mask).
Those who suffer from Melasma should avoid sun exposure. This means wearing sunscreen daily and reapplying the sunscreen every 2 hours. Dermatologists also recommend wearing a wide-brimmed hat when outside as sunscreen alone may not give you the protection you need.
There are treatments available that improve the appearance of melasma, and may erase signs of it completely. However, without proper skin protection melasma may return.