Acne marks are usually caused by improper treatment, improper care, etc. They can be eliminated by strengthening sun protection, medication and medical treatment. 1. Strengthen sunscreen: acne patients themselves skin barrier function is relatively weak, when exposed to excessive ultraviolet radiation is more prone to local skin pigmentation, thus aggravating acne darkening, so the patient should pay attention to strengthen the sunscreen measures, such as going out when using hats, masks, umbrellas, sunglasses, sunscreen, sunscreen spray and other sunscreen products, to help cut off ultraviolet radiation damage. 2. Medication: For patients with relatively mild symptoms of acne darkening and lighter color, you can apply topical acne cream ointment, hydroquinone cream, vitamin A cream, arbutin, vitamin E cream and other creams that contain decoloration function to help lighten the acne marks and brighten the skin color, which can help patients to get rid of the acne darkening effectively. 3. Medical treatment: For patients with more serious symptoms of acne marks and dullness, which have a greater impact on their appearance, they can try to break down the melanin deposits and accelerate the metabolism of melanin through fractional lasers, picosecond lasers, chemical peeling, photorejuvenation, and other medical treatments, which can help to eliminate the darkness and dullness of acne marks on the facial skin, and have a better effect. It should be noted that the above drugs and treatment measures need to be carried out under the guidance of a physician to avoid the occurrence of adverse reactions.