After the laser treatment of Won-COSJET, Korea 1. Immediately after the treatment, cold compress for 15-20 minutes to reduce pain and possible thermal damage; 2. 3 months after the surgery, do not scratch or press the wound; 3. Spicy food such as chili, pepper, ginger and other irritating foods in January; 6, one week after treatment (before the scab is removed) avoid the external use of non-medical skin care products and pigment removal drugs (in addition to medical advice); 7, after treatment, if there is a rash, itching and other discomfort, please contact your primary care physician as soon as possible to deal with.