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An example of hyperpigmentation is melasma (also known as chloasma). This condition is characterized by tan or brown patches, most commonly on the face. Melasma can occur in pregnant women and is often called the "mask of pregnancy;" however, men can also develop this condition. Melasma frequently goes away after pregnancy. It can also be treated with certain prescription creams (such as hydroquinone). Read more about hyperpigmentation and hypopigmentation skin conditions.