This is usually the: result of excessive sun exposure. Multiple products have been developed to lighten skin tone or even out spots/marks by lessening the amount of the skin pigment melanin. Hydroquinone is used primarily but it can thin the skin; higher concentrations require a prescription. Other agents include azelaic acid, glutathione, alpha hydroxy acids and laser or cryosurgery. All need Doctor supervision
Answered 12/14/2016
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