I believe that this is a concern for all of us as to whether or not we need stitches after a trauma, how we should handle it, and which wounds can be treated by ourselves and which wounds need to be treated in the hospital. Regarding the principle of wound treatment, if the wound is larger than three millimeters, it is usually recommended that it should be stitched up, so that the scar will be smaller and the alignment will be more neat. Of course, it is not recommended to find an emergency physician for large stitches and sutures, but a cosmetic surgeon, using a thread thinner than a hair, to align in multiple layers and try to restore the original anatomical position for suturing. The skin layer can be glued or sutured with the thinnest cosmetic thread, which leaves the smallest and least visible scars. The first point for scar remnants is whether the suture alignment is neat and whether there is a good reduction of tension. Therefore, it is very important to deal with this step in the early stage. If it is handled well in the early stage, there is no need for incision and re-suturing in the later stage, and the trauma of re-suturing must be even longer than the first time. For facial trauma, bleeding is usually more frequent. Once when I worked in the emergency department, I saw someone come in with a face full of blood, and I subconsciously thought it should be heavier at that time. But after clearing the wound, we found that it was just a small cut on the scalp, and it flowed all over the face and body, which is also noteworthy. After the blood comes out, the first thing we have to do is to press for a while to keep it too out. After that, use water to rinse it off, bandage it up and go to the nearest hospital for treatment. If it is a more serious part of the injury, or there is contamination, you need to immediately call the emergency number and send to the hospital to be handled by a doctor. Although the general small wounds, you can handle their own bandages. However, if it is pierced by a nail and pierced deeper, as the nail is rusty, these contaminants are likely to stay in the wound and cause it to grow. If the deep wound is not disinfected and treated in the hospital, the risk of tetanus infection is very high. Therefore, when considering treating a wound, be sure to administer tetanus injections while doing so. If you are unfortunate enough to have tetanus, the symptoms will indeed be very severe and the survival rate of first aid is not high, so you need to pay attention. If a finger is broken, an ear is bitten off, a nose is bitten off, and an amputated limb needs to be replanted. The doctor will make adjustments according to the situation and try to replant it back to its original position to keep it clearly alive. If the condition is available at the time of occurrence, be sure to rinse the missing tissue and wrap it in a towel or gauze. Wrap it in two plastic bags and put the outer plastic bag into ice water. Do not put it directly into the ice water, as it may soak it and produce damage to the tissue cells if it travels far. For tissue reimplantation, the golden 8 hours are very important, if the success rate of reimplantation is relatively low after 8 hours. If nausea, vomiting or coma occurs after trauma, make sure to turn your head sideways to avoid accidental aspiration. Ice packs are applied locally to reduce the swelling damage and help to relieve our state.