Why do you get unsightly centipede-like scars on car accident trauma wounders surgical incisions? The key problem is that there is too much tension on both sides of the wound, which tends to give the body the wrong instructions for closure, allowing the wound to proliferate more severely. I often give my students or patients an analogy to understand the cause of centipede scars: the surgical incision that we re-sew is like the seam of our pants, and the two pieces of skin that are sewn together are like the cloth on either side of the seam. Life experience has taught us that the tighter the cloth on either side of the trouser seam, the greater the tension and the more likely it is to split. Similarly, if it happens to our skin, the greater the tension of the skin on both sides of the suture, the wound is not easy to close, the body will receive the signal “need to proliferate tissue”, it will grow more scar tissue cells to close the wound, after a long time, it is easy to form the common “centipede scars”; on the other hand, if the skin on both sides of the suture is tight, the greater the tension, the more likely to open the line and split. On the other hand, if the skin tension on both sides of the suture is small or no tension, the skin is tightly fitted, the body receives the signal of “needing to proliferate tissue” is not strong, and only needs to proliferate fewer tissues to heal the wound, then the healed scars are usually linear scars in nature. Therefore, the reduction of tension on both sides of the scar is the core of scar treatment. For now, this is the goal we can achieve through specific suture techniques to reduce the tension of the suture wound, and it is the key to the good surgical results of “Ultra Tension Reducing Suture Fine Surgery”.