Back acne marks melanization, also known as post-inflammatory hyperpigmentation, removal methods include general treatment, medication, physical therapy, chemotherapy, surgical treatment and so on. 1. General treatment: You need to pay attention to keep the skin clean and hygienic, remove excess oil from the back skin, and avoid squeezing and scratching if there is still acne on the back. 2. Medication: Post-inflammatory hyperpigmentation can be treated by applying appropriate amount of hydroquinone cream, retinoic acid cream and other medications as prescribed by the doctor. 3. Physical therapy: There are many physical methods that can be used to remove acne marks, such as laser therapy, intense pulsed light therapy, radio frequency therapy and so on. 4. Chemical treatment: patients can also follow the doctor’s instructions to use a low concentration of fruit acid peeling treatment, to stimulate the skin newborn, lighten the pigmentation. 5. Surgical treatment: For more serious cases of hyperpigmentation, they can be treated by microcrystalline abrasion, dermabrasion and other surgical methods. It is recommended that patients with back acne marks and melanin deposits should consult a doctor in a timely manner and strictly follow the doctor’s instructions to carry out the appropriate treatment.