Hydroquinone cream does not necessarily remove hyperpigmentation completely, but it can lighten it. Hydroquinone ointment is a kind of medication for treating skin diseases, mainly used to treat hyperpigmentation caused by chloasma, freckles, acne, trauma, etc. It can lighten the hyperpigmentation, but it may not be completely removed. Hydroquinone ointment is a light-sensitive substance, use note that it is best to apply it at night and not use it during the day, so as not to aggravate the irritation of the skin and cause allergic reactions. Do not rub normal skin near the damage to avoid uneven skin color. Hydroquinone is unstable in nature, easy to oxidize into brown, especially in light and alkaline conditions, should be sealed and kept at low temperature away from light. Contraindicated for pregnant women and children under 12 years of age. Patients are advised to use the medication as prescribed under medical supervision and avoid self-medication to avoid adverse effects.