Hydroquinone should be applied to the affected area and rubbed in well. Most discolorations begin to lighten after 4 weeks of treatment but it may take longer. After desired bleaching, use only as needed to maintain results of treatment. Hydroquinone bleaching is faster, more dependable and easier if the treated area is protected from ultraviolet light. Therefore, exposure to sunlight should be minimized at the period of treatment. During day, an effective broad-spectrum sunscreen should be used, unnecessary solar exposure should be avoided and protective clothing should be used to prevent repigmentation of treated areas. After reduction of hyperpigmentation, use...