Caesarean section is an important surgical midwifery method. Caesarean section is to cut the abdominal wall and uterus and take out the fetus. Its advantages are no labor pains, no tearing of the birth canal and no fear of dystocia. So now many women choose to give birth by caesarean section. But caesarean section also has its annoying side, because it will leave surgical scars after the operation. A big ugly scar suddenly appeared on the smooth and slender waist. If you don't remove it, how will it affect dressing in the future! So how to remove the scar left after caesarean section? Caesarean scar can be repaired by simple suture or skin flap transplantation, depending on scar size and hyperplasia. In fact, most caesarean section scars can be stitched beautifully, and some scars even look like thin lines. I believe many women have heard that caesarean section wounds will look better, but straight cutting will be ugly. In fact, as long as there is a surgical wound, it will definitely leave a scar, and straight cutting will definitely be ugly. If expectant mothers want to avoid ugly postpartum scars, they must first understand the basic concepts of scar formation and prevention. Once there is a wound on the skin, the human body will begin to heal itself. There are two mechanisms for wound healing. If the wound is in the epidermis, the human body will create the same cell tissue to fill the wound without leaving a scar. But if the wound goes deep into the dermis, in order to prevent the wound from splitting, the skin will produce strong scar tissue to effectively connect the wound. Within three to six months after injury, scar tissue will proliferate, which is called proliferative phase. During this period, the human body will proliferate tiny blood vessels near the wound to supply nutrition for the scar tissue. So the early scar looks red and convex, and feels like a rope. If the healing process is smooth, it will enter maturity after the proliferative phase, and the mature scar will fade, flatten and soften, with an average time of three to six months. However, whether in the proliferative phase or mature phase, scar tissue will be constantly updated according to the environment. It is not only a mass of meat on the wound, but also a living and changing tissue, so the treatment of scar must be aimed at the cause, not static.