Skin injury melanin precipitation removal, first of all, you should do a good job of the affected area of the skin moisturizing and sunscreen, the skin can gradually recover on its own; can also be treated by drugs or laser. 1. Drugs: you can apply vitamin E ointment, hydroquinone cream and other drugs under the guidance of the doctor for treatment. Hydroquinone cream is a kind of skin discoloring agent, and vitamin E ointment can promote the decomposition and metabolism of melanin, so as to achieve the purpose of lightening hyperpigmentation. 2. Laser treatment: Laser can destroy pigment molecules to remove hyperpigmentation. Patients are advised to maintain a healthy lifestyle, eat a balanced diet and pay attention to skin care. If there is a need for treatment, it is recommended to go to the hospital and choose the appropriate treatment under the guidance of the doctor.