I. Before treatment 1. Avoid sun exposure two weeks before surgery. 2. Make a habit of applying sunscreen, i.e.: ① Use sunscreen no matter what the weather is, regardless of spring, summer, autumn or winter, because even in winter, the dose of long-wave ultraviolet rays (UVA) is still at a high level, and only medium-wave ultraviolet rays (UVB) have decreased; ② Apply sunscreen even though you stay indoors all day (because indoor fluorescent tubes also emit UV rays, and if you stay indoors for 10 If you stay indoors for 10 hours, the intensity of UVB is equivalent to 1 hour outdoors); ③ If you spend a lot of time outdoors, you should reapply a layer of sunscreen every 2-3 hours, because the effectiveness of sunscreen will decay; ④ The correct way to apply sunscreen is to place a soybean or peanut-sized sunscreen on your palm, apply it in a circle on your hand and pat it on your face, so as to avoid blocking the pores of the sunscreen; ⑤ Physical sunscreen containing zinc oxide, titanium dioxide sunscreen can block both UVB and UVA, is the best choice (such as Winona 30+); ⑥ good sunscreen will not contain lead, so there will be no hyperpigmentation, lead dermatitis. ⑦ Sunscreen is not going to cause fatty grains, so eyelids (upper and lower eyelids) should also be applied. 3. The better the hydration status of the skin, the more obvious the improvement will be after the treatment. Therefore, it is important to correct the dry skin state before the operation by using strong moisturizing cream and moisturizing mask (3 times a week). Second, after the treatment 1, immediate skin care, can take collagen mask wet at least half an hour, apply epidermal growth factor gel. 2, 3 days after surgery once a day for wet compress, after 3 days can be changed to 2-3 times a week as appropriate. 3, 1 month after surgery should avoid sun exposure and strenuous exercise. 5.The postoperative recovery period should avoid the intake of spicy and idiopathic foods (such as seaweed, sea cucumber, beef and mutton, etc.), photosensitive foods or drugs. 6.Avoid skin massage, fumigation, medicinal bath, sauna and other items after surgery.