The correct use of hydroquinone (hydroquinone) cream is once a day in the morning and evening, the appropriate amount of application of topical spots, generally applied a few weeks, pigmentation spots will be reduced; such as treatment for 2 months and still no effect of removal of spots, lightening of pigmentation, the drug should be discontinued. Hydroquinone cream is a skin discoloring agent. It works by inhibiting the oxidation of tyrosinase to 3,4-dihydroxyphenylalanine (dopamine) and other melanocyte metabolic processes, resulting in reversible skin discoloration. It is mainly used for the treatment of melasma, freckles and post-inflammatory hyperpigmentation spots. Some patients may experience a burning sensation when using the drug; occasionally a local allergic reaction occurs, such cases should be discontinued immediately and treatment should be given. It should be noted that the use of this product is prohibited for those who are allergic to it, children and pregnant women. In addition, the drug can be used only on the areas of skin lesions, not on normal skin. The drug should be used under medical supervision.