Scar hyperpigmentation on the leg is mostly considered to be related to post-inflammatory hyperpigmentation, which can be improved by medication, physical therapy, and other treatments. 1. Medication: For patients with post-inflammatory hyperpigmentation on the legs, you can follow the doctor’s instructions to use topical retinoic acid cream, adapalene gel and other retinoic acid cream, which can promote the renewal of epidermal cells, but the drug has the risk of teratogenicity. Oral niacinamide, tranexamic acid and other drugs can also be taken to help reduce hyperpigmentation and inhibit the proliferation of melanocytes. 2. Physical therapy: Patients are advised to take laser therapy to lighten pigmentation through selective photothermal effect. 3. Other treatments: patients can also use chemical exfoliators, through the role of chemical substances on the surface layer of the skin, to promote the reconstruction of the skin epidermis, reduce hyperpigmentation. For patients with post-inflammatory hyperpigmentation on the legs, if they feel that it affects their aesthetics, they can go to the hospital and choose the appropriate way to improve under the guidance of the doctor.