Laser cosmetology generally uses high energy to act on the skin. After surgery, skin redness, mild edema or epidermal damage may occur. Cold spray, ice compress or wet compress mask should be applied to the treatment area immediately. Do not rub the skin. Generally, erythema Relatively mild, it is a normal response to treatment and will gradually subside naturally. At the same time, timely wet compress after surgery can relieve pain and discomfort caused by treatment, reduce skin temperature, and avoid pigmentation.