Once a skin whitening treatment has been purchased, consumers may be unsure about how to proceed, or about what to expect from the product. While different over-the-counter products are bound to involve different methods and intervals of application, most products are simply used topically on a regular schedule, possibly in combination with another skin care product. For the best possible results, consumers should precisely follow directions printed on packaging materials, and should take note of any unexpected reactions that may occur. Over time, consumers who choose natural, effective whitening products can count on gradual skin lightening.