Malassezia infection, or clinically known as acne, is a chronic inflammatory disease of the sebaceous glands. The black acne marks that remain after acne heals are also known as inflammatory hyperpigmentation, which can be relieved through temporary observation, topical medication, and physical therapy with a specialist. 1. Temporary observation: Localized inflammatory hyperpigmentation generally does not affect the patient’s health, and most of the hyperpigmentation can gradually fade away on its own over time, so you can choose to temporarily observe and wait for it to fade away on its own. During this period, it is necessary to do a good job of hydration and moisturizing, strict sun protection. 2. Topical medication: Adapalene and other retinoids can be used externally to promote the renewal of epidermal cells and improve local hyperpigmentation. 3. Physical therapy: commonly used physical therapy for laser treatment, through photorejuvenation, c6, picoseconds and other photoelectric treatment, for the precipitation of melanin, can play a selective photothermal effect, to achieve the purpose of lightening the acne marks. It is recommended that patients who have the will to treat patients to regular medical institutions, follow the advice of specialists to standardize the treatment, do not self-medication.