Causes of trauma: Common causes of trauma are often pediatric falls, car accidents and injuries caused by others. Common injury time: every Monday and every Friday, especially during the peak commuting period, to remind travelers to pay attention to safety. Commonly injured parts: commonly on the face (forehead, jaw, cheeks and nose), followed by the head, and then hands. General treatment method: ordinary silk suture directly full layer, the result: will leave a “centipede-like” scar, the scar is wide, plus the two sides of the needle eye, the later repair is often very difficult. The scar is wide and the stitches on both sides are often very difficult to repair later. Moreover, there are often cases of poor healing and wound dehiscence. Microscopic treatment method: tissue reset is very critical, applying absorbable sutures to each layer of deep tissue, restoring the continuity of tissue, subtending sutures under the skin, and applying cosmetic sutures to the epidermis, basically without needle eyes, leaving a small scar like a thin line at the end of recovery. Post-healing treatment: After the wound heals well on schedule, anti-scar medication should be applied for 3-6 months to inhibit scar proliferation.