First, before treatment 1, two weeks before the operation to avoid sun exposure, otherwise easy to pigmentation and scarring. 2, develop the habit of applying sunscreen, that is: (1) no matter what the weather, no matter spring, summer, fall and winter, you have to use sunscreen, because even in winter, the dose of long-wave ultraviolet rays (UVA) is still at a high level, and only the medium-wave ultraviolet rays (UVB) have declined; (2) even though the whole day stay indoors, you also need to apply sunscreen (because indoor fluorescent light tubes also emit ultraviolet rays, and if indoors Stay 10 hours to receive the intensity of ultraviolet radiation equivalent to outdoor 1 hour); (3) if outdoor activities for a longer period of time, should be every 2-3 hours to reapply a layer of sunscreen, because the effectiveness of the sunscreen will be attenuated; (4) the correct way to apply is to put a soybean or peanut-sized sunscreen in the palm of the hand, in the hands of the circle coated, patted on the face, which can avoid sunscreen clogging pores; (5) physical sunscreen containing zinc oxide, titanium dioxide, and other physical protection. Zinc oxide, titanium dioxide physical sunscreen can block both UVB and UVA, is the best choice (such as Kashidri, Corestripe or Avène SPF30 +); (6) a good sunscreen will not contain lead, so there will be no hyperpigmentation, lead dermatitis. (7) Sunscreen is not going to cause fat grains, so eyelids (upper and lower eyelids) should also be applied. (3) Two weeks before the operation, you should start using fruit acid products (such as Corexit Whitening Gel, active serum/cream/lotion, Beshu Cream), L-VC serum, Hydroquinone Cream, and Tranexamic Acid, which will help to whiten the skin color, improve the skin’s self-renewal ability, and increase the therapeutic effect of the laser/intense light. 4. The better the hydration status of the skin, the more obvious the improvement will be after the treatment. Therefore, the dry state of the skin must be corrected before the operation, using strong moisturizing cream (three generations of fruit acids), moisturizing mask (once a day or once every other day). 5, certain people are not suitable for laser/intense light treatment, such as pregnant women, lactating women, patients with malignant tumors, endocrine disorders (such as hyperthyroidism, etc.), serious cardiovascular or other systemic diseases, mental disorders, unrealistic fantasies about the efficacy of the treatment, keloid, oral retinoic acid within half a year, and can not follow the doctor’s instructions well. 6, fractional laser or like a beam laser and other minimally invasive laser before treatment must be carried out to assess the skin, if the skin is too dark, more pigmentation, chloasma activity, skin sensitivity (redness), it is recommended to carry out intense pulsed light treatment for 1 time, half a month after the treatment. If there are more acne blackheads and pimples, or if the skin tone is dull and atrophic, it is recommended to perform fruit acid resurfacing once, followed by laser treatment 1 week later. This will reduce these post-operative side effects (more than 60%) and shorten the recovery time (2-3 days). 7, some laser surgery before the need to apply surface anesthetics (compound lidocaine cream), the full range of the Department of 3-4 pcs, after applying the plastic wrap sealing package, 1-2 hours to achieve the best anesthesia effect. Second, after treatment 1, immediate skin care will minimize erythema, soothe the pain, reduce skin temperature, to avoid discoloration. Immediately after the treatment of intense pulsed light, Q-switched Nd:YAG laser, dual-wavelength laser, ruby or fractional ruby, infrared skin tightening, radio frequency skin tightening, etc., use alkaline fibroblast growth factor (FGF) mask, humanoid collagen mask wet 0.5-1 hours, apply epidermal growth factor gel. 2.The mask is applied once a night for 3 days after surgery, and can be changed to 2-3 times a week after 3 days as appropriate. 3.If the redness and swelling of the skin is heavy after surgery, you can use soft hormonal ointment (e.g. Ketenex) for 3 days, and then apply recombinant epidermal growth factor gel or scald cream (Mabel’s Wet Scald Cream) on top of it. Oral prednisone/metroglide or non-steroidal anti-inflammatory agents (e.g. Ankylosing, Cilostro, Fenpropidol, etc.) for 3 days. 4. Avoid sun exposure and strenuous exercise for 1 month after surgery. 5, postoperative recovery period should be avoided intake of spicy, hairy foods (such as kelp, sea cucumber, beef and mutton, etc.), photosensitive foods or medicines (for a detailed list, please refer to the article on the website ) 6, 2 weeks after the operation to avoid skin massage, fumigation, medicated baths, saunas and other items. 7, in order to avoid post-inflammatory color deposition, should continue to use decolorizing agents (such as Corexin whitening gel, hydroquinone cream, Tranexamic acid) for 1 month after the operation. 8, the day of treatment will be some redness and swelling at the skin lesions, about 24 hours to disappear naturally; after treatment, if the skin is not broken, you can wash your face, apply skincare products, make-up immediately. If the skin is a little red, it is recommended to make up the next day. After treatment, if there is a thin scab at the skin lesion, don’t pick it with your hands, wait for the natural shedding (5-7 days) to avoid scarring and discoloration; individual patients with temporary loss of pigmentation or hyperpigmentation after treatment, generally will gradually return to normal, the time varies from person to person, generally 3-6 months to naturally subside. The time varies from person to person, usually 3-6 months to fade away naturally. Extremely individuals need 2 years. 9, some diseases (such as nevus erythematosus) will appear temporary small blisters or blisters, try not to break the blisters, wait for natural drying. If the blister is large, use a sterile syringe to puncture it and draw out the water or gently squeeze it out from one side. Once the blister is ruptured, it should be disinfected regularly (iodine povidone 1-3 times a day), do not close the bandage, and apply burn ointment or gentamycin ophthalmic ointment, bactrim, lisdex and so on. 10.After fractional laser or image beam laser surgery: immediately apply soft laser (such as Ketin skin), then apply reorganized epidermal growth factor, apply FGF mask, cold compress 0.5-1 hours. Follow up on the second day to determine skin recovery. After surgery, apply Ketamine 2 times daily for 3 days. Growth factors 4 times a day, apply for 7 days, mask 1 time a day, apply for 7 days. 7 days later follow-up, if the skin color deepens, you can apply hydroquinone cream, L-VC, whitening gel, Tranexamic acid, or fruit acid resurfacing for 1 time; if erythema occurs, you can undergo intense pulsed light treatment for 1 time. 11, regular follow-up. In addition, once any condition occurs, you should return to the doctor’s office immediately for face-to-face consultation and treatment, so as not to delay the condition or take a detour.