Dark spots on the skin, or hyperpigmentation, occur when some areas of the skin produce more melanin than normal. Melanin is the main determinant of skin color. It is also found in the hair and the iris of the eye.
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Dark spots on the skin, or hyperpigmentation, occur when some areas of the skin produce more melanin than normal. Melanin is the main determinant of skin color. It is also found in the hair and the iris of the eye.