Hydroquinone does not "bleach" the skin but only prevents the production of the extra melanin that causes hyperpigmentation. When these products stop the overproduction of melanin, newly formed skin cells can reach the surface and give the appearance of "faded" spots.
Recent studies that claim hydroquinone has carcinogenic properties refer mostly to industrial-grade or contaminated cases. One well-known dermatologist told a newspaper last year that she considered hydroquinone the best and most effective method of treating pigmentation disorders.
Before rushing ahead to fade these darkened patches, make sure you check with your dermatologist to rule out melanoma completely. After using a topical ingredient to fade sun spots, you can also complement them with cosmetic peels and/or laser treatments that may help expose newer skin cells by exfoliating the skin.
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