As there is no cure for scars, but the wide, uneven scars can be thinned and flattened through plastic surgery, most friends will think: “Isn’t that simple, just cut it out and sew it up”, in fact, the surgical operation has a lot to do with the size of the scars and the degree of hyperplasia after surgery. The size of postoperative scars and the degree of hyperplasia are mainly related to the following factors: 1) Self-factor: i.e., whether or not the scar body; 2) The neatness of the cut edge during surgery; 3) Adequate reduction of tension sutures during surgery; 4) Use of imported absorbable threads to reduce the stimulation of tissues; 5) Use of fine stitches for the outer layer as much as possible; 6) To prevent the postoperative scar from shrinking, the suture opening should be designed as To prevent postoperative scarring, the suture opening should be designed as “serrated” or “Z” shaped; 7. Therefore, to achieve the post-operative scar as fine as possible, in addition to their own factors can not be changed, as the surgeon and patients, can start from the above 2-7 points, make the surgery fine, do a good job of post-operative care, and strive to achieve: “remove the scar without leaving a scar”.