The black marks left after potion spotting, also known as melanin deposition, can be improved by topical medication and laser treatment. 1. Drug treatment. Topical application of some drugs with antioxidant and inhibiting pigment cell formation can promote the dissipation of melanosis, such as topical retinoic acid cream, vitamin E pills, etc. Some people may experience burning in the process of application. Part of the population in the use of the process, the local may appear burning and tingling, peeling and other adverse reactions, when the symptoms are serious need to stop treatment. 2. Laser treatment. Laser treatment can reach the deep layers of the skin, and use heat energy to destroy pigment cells, so as to achieve the purpose of lightening hyperpigmentation and eliminating hyperpigmentation. There may be pain and discomfort during the treatment, and skin care needs to be strengthened after the treatment. Due to the different physique of individuals, the treatment effect may also have some differences, the specific situation should be analyzed by the doctor in conjunction with their own situation.