Acne scar hyperpigmentation refers to the inflammatory pigmentation left after acne healing, which can be repaired through medication and physical therapy. 1. Medication: Patients with post-inflammatory hyperpigmentation can take drugs such as reduced glutathione and niacinamide as prescribed by the doctor, which can inhibit melanin formation and reduce hyperpigmentation. You can also follow the doctor’s instructions to use topical retinoic acid drugs, such as retinoic acid cream, adapalene gel, etc., can promote epidermal renewal, reduce hyperpigmentation. 2. Physical therapy: patients can also choose laser treatment, the use of Q laser photothermal effect, crushing the melanin particles in the skin, promote its absorption and metabolism or discharge, so as to achieve the effect of reducing hyperpigmentation. If there is post-inflammatory hyperpigmentation, it is recommended to go to a regular hospital and cooperate with the doctor to standardize the treatment, so as not to cause adverse consequences.