The principle of laser blemish removal is through selective photothermal principle, different wavelengths of light are absorbed by the corresponding pigments, and the pigment particles rapidly expand and break up after absorbing the high energy of laser in an instant, forming smaller fragments, which are removed by phagocytes in the body in the subsequent inflammatory reaction. Thus, the purpose of lightening pigmentation is achieved. Generally speaking, there will be some redness, swelling and burning sensation or slight exudation on the affected area after laser treatment, which is normal and will disappear in about one or two weeks. This is normal and will disappear after one or two weeks. A scab will be formed and will fall off in about seven to ten days. After all the scabs fall off, the doctor will let you wash your face, usually for 7 to 10 days. It is important to clean your face and apply anti-inflammatory medication on a daily basis, and to care for your skin as directed by your doctor to avoid skin infections. Generally speaking, the most common condition is dry skin, so it is important to strengthen moisturizing and sun protection. If your skin is sensitive, it is best to reduce outdoor activities for a week after treatment. Some low energy laser treatments are woundless and do not require special wound care. However, there will be a short period of redness and swelling in the treated area, which will last from a few hours to a few days, but it will not affect daily life and work, and you can wash your face and even put on makeup after two hours. After the treatment, you must follow the doctor’s medical advice for recovery and go to the hospital for regular review. Do your usual job of sun protection.