1, preoperative preparation: first thoroughly wash off the face of cosmetics. Because the composition of cosmetics is complex, we can’t be very sure that the intense light and cosmetics do not react to any of the ingredients when treating with intense pulsed light, so for the best treatment effect, we use a method that allows patients to thoroughly clean their faces. Before each treatment, we will take pictures of the patient for the comparison of the efficacy after treatment. 2.Treatment: Before each treatment we select the treatment parameters according to the patient’s skin type and the depth and size of the lesions. Subsequently, a cold gel is applied to the treatment area and a scanning type of treatment is performed on the treatment area. The full treatment usually takes 15-20 minutes. There is only a slight pain during the operation, similar to the feeling of rubber band popping up. 3.Post-operative care: After the treatment, we provide free cold compresses for 15-30 minutes. 4.Caution: After treatment, it is best to use medical skin care products for sensitive skin and avoid using functional cosmetics such as whitening and spot removal. Exposure to sunlight should be avoided and medical sunscreen (sunscreen index SPF>30) should be used regularly to prevent the occurrence of pigmentation. You can wash your face and take a bath after the operation, and it has no effect on the patient to carry out normal daily activities.