Cause of Hyperpigmentation by Melasma.

Melasma is a common skin problem caused by brown to gray-brown patches on the face.

Most people get it on their cheeks, chin, nose bridge, forehead, and above  upper lip.

It is more common in women than men.

• Pregnancy is a common cause of melasma.
• It also affects woman taking oral contraceptives and hormones.

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