Melanin deposits left behind by inflammation are usually caused by inflammation stimulating melanocyte synthesis. Patients are advised to remove it through general treatment, topical medication and physical therapy under the guidance of doctors. 1. General treatment: patients should do a good job of sun protection in daily life, to avoid ultraviolet radiation stimulation leading to aggravation of pigmentation. At the same time, avoid friction and stimulation of the pigmented area. 2. Topical medication: Patients can use Mucopolysaccharide Polysulfate Cream to improve blood circulation under doctor’s guidance. Hydroquinone cream and retinoic acid cream can also be used externally. 3. Physical therapy: patients can be treated with intense pulsed light, radiofrequency therapy or microneedling therapy under the guidance of doctors. For patients who are left with melanin precipitation after inflammation, it is recommended to go to regular hospitals for timely examination and standardized treatment under the guidance of professional doctors.