5 points that must be known before scar treatment 1, scar recovery takes a certain amount of time, 1-3 months for short cases and 1-2 years or more for long cases. 2.After wound healing, if the local skin appears red, swollen, higher than the skin surface, painful and itchy, etc., it is a proliferative scar, and topical products can be used to control the pain and itch, inhibit scar proliferation and promote scar maturation, such as Conrad, silicone gel topical application or silicone film sheet topical application. (The criteria for scar stabilization are: flattening, whitening, softening, and no pain and itching.) 3. If scar reshaping treatment is needed, children should be able to cooperate when they are at least 10 years old, preferably after their development is basically completed at the age of 18. The same recovery period of more than 3 months is needed after the end of the treatment. (Different options should be chosen according to the specific situation: excision and suture or local flap transfer surgery if the area is small, sawtooth reshaping if the scar is obviously straight, expander flap repair surgery if the scar area is large, and further options such as fractional laser after the surgery to make it fade and blur.) 4, The scar can be reviewed every 30-45 days before stabilization to observe the effect and adjust the treatment measures. 5. No method can completely remove the scar.