Many patients with traumatic injuries often ask for X-rays when they visit the doctor, thinking that taking pictures will definitely help in the diagnosis and treatment of the injury, and they are not sure whether “bone fracture” or “wrong bone suture” has occurred, especially when some patients have already taken X-rays in general hospitals and have to go to another hospital. This is a widespread misconception. In fact, this is a widespread misconception, resulting in patients receiving unnecessary radiation injuries and financial burdens. So is it necessary to take X-rays after trauma? To understand this question, we should first explain the simple principle and role of x-ray film. Different tissues in the human body have different densities and have different absorption rates of radiation. X-rays are an important auxiliary examination that uses the different transmission rates of tissues to form intuitive images for the diagnosis of diseases. However, X-rays also have great limitations, for example, gases, liquids and most soft tissues in the human body cannot or cannot be imaged well. For example, gas, fluid and most soft tissues in the body cannot be imaged or cannot be imaged well. These tissues with low density cannot be judged correctly by ordinary X-ray, so it cannot play the role of an auxiliary diagnosis. In addition, radiation is harmful to the human body, and the need for X-ray examination should be judged by an experienced doctor, who will make the decision more carefully. After a patient suffers a traumatic injury, there are certain signs and symptoms in the injured area, such as whether there is local swelling, whether there is bruising, whether the skin is bruised, and whether there is pain from force and weight bearing. During the patient’s visit, the doctor’s careful questioning of the patient’s injury and physical examination are the most important diagnostic bases. Therefore, the need to take X-rays should be decided only after the professional doctor has carefully examined the patient and found or suspected signs of injury such as fracture and dislocation, in order to further clarify or help treatment, to avoid unnecessary losses. In addition, we should not “superstitiously” have an X-ray examination to clarify all the problems, due to the time of injury, the location of the X-ray film taken is different, in this location did not see clearly whether there is a fracture, but in another location on the film can be seen on the problem. In some cases, the fracture may not be identified at the time of the injury even on the basis of the x-ray taken, but after ten days or two weeks, the fracture may be clearly visible due to the local absorption of the original tiny fracture line. All of this can only be determined by an experienced physician after a personal clinical examination of the patient.