Hyperpigmentation after mole spotting is also known as post-inflammatory hyperpigmentation, most of which can subside on its own; if it exists for a long time and affects the appearance, it can be improved by medication and other treatments. 1. Medication: Niacinamide, cyanoquinone cream and other drugs that inhibit the proliferation of melanocytes can be used externally to reduce hyperpigmentation; deoxyarbutin and other drugs that inhibit the activity of tyrosinase can also be used externally to reduce hyperpigmentation. In addition, it can also be used topically with drugs such as retinoic acid and adapalene to promote epidermal cell renewal. 2. Other treatments: including chemical peeling as well as laser treatment. Chemical peeling is to apply fruit acid, salicylic acid, etc. to the area of post-inflammatory hyperpigmentation, and promote the metabolism of the skin through the action of chemical substances on the surface layer of the skin. Laser treatment is to lighten hyperpigmentation by selective photothermal action of laser on melanin, such as carbon dioxide laser and picosecond. It is recommended that patients with post-inflammatory hyperpigmentation go to local regular hospitals and cooperate with doctors for standardized treatment.