Melasma. The forehead is a common place for melasma to appear.
Melasma (muh-LAZ-muh) 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.
Sun exposure triggers melasma.
One of the most common treatments for melasma is sun protection. This means wearing sunscreen every day and reapplying the sunscreen every 2 hours. Dermatologists also recommend wearing a wide-brimmed hat when you are outside. Sunscreen alone may not give you the protection you need. Women are far more likely than men to get melasma. It is so common during pregnancy that some people call it the mask of pregnancy. Hormones seem to trigger melasma.
Learn more about melasma Image used with permission of the American Academy of Dermatology National Library of Dermatologic Teaching Slides.