Melasma is a common pigmentation disorder that causes brown or gray patches to appear on the skin, primarily on the face.The most common areas for melasma to appear on the face include:
->  the bridge of the nose
->  the forehead
->  the cheeks
->  the upper lip

Melasma may also appear on other areas of the body, especially those exposed to a lot of sunlight. These areas may include:

->   the forearms
->   the neck
->   the shoulders

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