Fractures usually occur as a result of trauma, and the severity of fractures caused by trauma varies depending on the magnitude of violence, and can be simple fractures of bone or crushed fractures, obvious misalignments or fractures without displacement, single or multiple fractures, or multiple fractures in the same limb. Fractures can also occur in the absence of obvious trauma, such as prolonged walking and marching exercises, and can be found in the neck of the front of the second metatarsal of the foot (that is, at the joint between the metatarsal head and the stem), with localized swelling and pain, a mass to the touch, and a bone fracture with bone scab formation around it on X-ray, called “marching fracture”. Other bones have similar conditions, such as the tibia or femur. If the fracture can be caused by only minor trauma, it is necessary to pay attention to the original pathology of the bone itself, such as cyst-like or other pathological changes in the bone, and the patient can have no symptoms, and the trauma is only the causative factor, which is usually called pathological fracture. Some patients with severe fracture laxity may even have spontaneous compression fractures of the vertebral body or rib fractures in the absence of trauma or in the presence of coughing.