Hydroquinone is generally referred to as hydroquinone cream, after using anti-black to reduce ultraviolet radiation, treatment of endocrine diseases, according to the cause of the symptomatic treatment, consider ultraviolet overexposure, the presence of some endocrine diseases, strengthen the treatment and so on. Hydroquinone cream, is a therapeutic drug for pigmentation, burns, scalds, laser surgery, grinding and other skin injuries left behind pigmentation and other conditions. Its mechanism of action is to produce reversible skin discoloration by inhibiting the oxidation of the enzyme that converts tyrosine to dihydroxyphenylalanine and inhibiting other melanocyte metabolic processes. 1. Reduce ultraviolet radiation: prolonged exposure to ultraviolet radiation can lead to melanocyte activity, so the phenomenon of anti-blackness should be strictly sunscreen, wear a sun hat, wear sunscreen clothing or apply sunscreen. 2. Treatment of endocrine diseases: Hydroquinone cream only temporarily inhibits the function of local melanocytes, if there are some endocrine diseases, it will lead to the increase of melanin again, this time we should actively treat the endocrine diseases, pay attention to the level of estrogen and progesterone. 3. Enhance the treatment: you can improve the degree of anti-blackness by combining systemic medication, such as oral vitamin C, vitamin E, tranexamic acid at the same time, or laser treatment, intense pulsed light treatment, and so on. Hydroquinone cream after use back black should be timely to the regular medical institutions to communicate with specialists to identify the specific causes of the disease, and then targeted treatment. If you need to use medication, you should strictly follow the doctor’s instructions.