Fractures refer to the disruption of the continuity and integrity of the bone, which can lead to symptoms such as localized pain, swelling, deformity, and even limited mobility. Therefore, pain is a primary symptom of fractures. Due to the displacement of fracture ends and the irritation of nerves around the periosteum, severe pain can occur. After a fracture, it is important to immobilize the affected area to avoid exacerbating the symptoms during transportation or movement, and immobilization can also help reduce localized pain.