The methods to lighten acne marks and melanin include medication as prescribed by the doctor, other treatments, and strengthening life care. 1. Medication: For those who have the need to lighten acne marks and melanin, they can follow the doctor’s instructions to use topical retinoids, such as isotretinoin, tazarotene, adapalene, etc. They can also use 25%~30% salicylic acid, 20%~70% fruit acid, etc. to perform medication. Also can follow the doctor’s advice with 25% ~ 30% salicylic acid, 20% ~ 70% fruit acid and other drugs for chemical peeling treatment. 2. Other treatments: Some patients can follow the doctor’s instructions through microneedle therapy, fractional laser, intense pulsed light, radio frequency treatment and other treatments to achieve the purpose of lightening acne marks and melanin. 3. Life care: in daily life, you can increase the intake of vitamin-rich foods, such as kiwi, cherry tomatoes, cucumber, carrots, spinach, etc., which is beneficial to improving the skin condition, but the effect is relatively limited. When you go out, you should pay attention to good physical sunscreen to avoid direct exposure to ultraviolet rays. It is recommended that those who have to lighten the acne marks and melanin follow the doctor’s instructions to use medication, not to use drugs or prescriptions on their own to prevent aggravation of the local skin condition.