The external nose is located in the center of the face, which is more prominent and vulnerable to trauma. The nasal bones are paired, the upper part is thick and narrow, which is fixed and not easy to fracture, while the lower part is thin and wide, lamellar and prominent, so it is easy to fracture and form deformity. The soft tissues of the nose are easily swollen and bruised after trauma. There is a nasal septum in the middle of the nasal cavity, and the root of the septum consists of bone and the anterior part consists of cartilage. A more serious collision may not only fracture the nasal bone, but also fracture and displace the nasal septum. The diagnosis can be made according to the clinical manifestations, and the nasal bone impactological examination is the basis for the diagnosis, and CT examination of the nasal bone is better than X-ray plain film examination. Within 24 hours of nasal trauma, local cold compresses should be applied to reduce soft tissue swelling and bruising, and cold wet towels or ice packs (ice can also be used) can be placed on the nose, which need to be changed at any time. More than 24 hours later, subcutaneous bleeding gradually quiescent, then you can do hot compresses, with hot wet towels, but the temperature should not be too hot. The purpose of hot compresses is to promote vasodilation, absorb blood stasis and swelling, reduce pain, and promote recovery. Before the nasal fracture is healed, it is forbidden to press the nose by hand to avoid aggravating the nasal fracture or misaligning the repositioned nasal bone again, which may increase the pain or affect the treatment effect. Nasal bone repositioning: It is a common treatment for nasal bone fracture and improvement of external nasal deformity, and should be done as early as possible. However, in cases with large fractures and severe displacement, the treatment effect is limited. The following signs often indicate the occurrence of cranial injury: (1) Coma and drowsiness, after nasal trauma, if the patient has transient coma or drowsiness, vomiting, nausea, etc., it indicates the presence of concussion, indicating the presence of cranial injury. (2) cerebrospinal fluid nasal leakage, after nasal trauma, if the flow of clear, watery liquid through the nasal cavity, or nasal flow of bleeding liquid, blood in the center is red, the surrounding color is light or colorless; this liquid can be collected for biochemical analysis, to understand whether the composition of the cerebrospinal fluid consistent with. An easy way to determine this is to take a small piece of gauze and dip the liquid suspected to be cerebrospinal fluid nasal leakage on the gauze, if it does not harden after drying, it is confirmed to be cerebrospinal fluid nasal leakage. This is because blood or nasal inflammatory exudate contains mucin, which can make the infiltrated gauze dry and hard. It must be noted that cerebrospinal fluid nasal leakage increases in flow with increased venous pressure when the head is lowered, force is exerted, the neck is compressed, and the fungal mouth is tightly buttoned. (3) After nasal trauma, if bacterial meningitis occurs repeatedly, even if cerebrospinal fluid nasal leakage is not obvious, the possibility of cranio-cerebral injury should be considered. (4) When the nasal trauma extends to the pterygoid saddle, it may cause pituitary injury, and the symptoms of polydipsia and polyuria may appear, which is traumatic uremia.