The occurrence of mild fracture means that the patient’s fracture degree is relatively mild, without dislocation, such as the occurrence of green branch fracture, crack fracture or linear fracture. After this kind of fracture, the patient will feel pinprick pain in the injured area, localized swelling, subcutaneous bruising, positive localized tenderness on palpation, positive axial percussion pain, restricted movement of the joints adjacent to the fracture site, and fracture lines can be seen on X-ray film. Conservative treatment should be adopted to prevent dislocation of the fracture site by immobilizing the fracture site with braces and splints.