Consider your skin as a factory which produces melanin, a pigment providing your complexion with its specific shade. In normal circumstances, worker cells called melanocytes produce a steady stream of color. But when melanocytes are exposed to a lot of sunlight, they can become a little haywire and will begin to produce far more pigment than usual. Then they will show up on your skin as dark patches. Identifying your spots is the first step in having a smooth complexion.
It may take months or even years for these dark spots or brown clusters to surface in areas exposed to the sun. Usually, when they are visible, the color will not fade without help. Since, they remain near the surface of the skin, they are responsive to treatment.
Melasma or chloasma
Typically, these dusky, frequently symmetrical patches show up on the cheeks, forehead and upper lip. They are triggered by hormonal changes with the use of birth control pills, during pregnancy or in combination with exposure to the sun. Sobel warned that this could be a persistent form of hyperpigmentation. Sobel added that it has a tendency to return easily.
Most likely, those with darker skin tones will suffer from these noticeable spots which remain after healing of an abrasion, pimple or burn. Melanin is carried deep into the skin and it will probably take 3 to 6 months for the color to disappear.