Hydrogen peroxide is a commonly used disinfectant in clinical practice, and it does have a decolorizing effect. However, due to improper application of hydrogen peroxide, it may cause adverse reactions and can lead to severe pain for patients, so it is not recommended for patients to use hydrogen peroxide to treat melasma by themselves, which may cause more damage to the skin. In fact, there are many ways to treat melasma clinically, like laser cosmetic, fruit acid peeling, and also oral vitamin C, vitamin E, tranexamic acid. You can also apply drugs externally, azelaic acid ointment, tretinoin and the commonly used hydroquinone cream, the effect is also good. But the application of these drugs, are under the guidance of a doctor to apply.