The humerus is the bony structure of the upper arm, the humerus includes the proximal end, distal end, humeral head, humeral neck, distal humeral stem and humeral slide, the humeral stem fracture has the following symptoms: 1, the most common symptom is pain, the patient feels local pain, especially the fracture break site pain is more obvious; 2, local soft tissue swelling, due to fracture caused by soft tissue injury will occur after soft tissue edema, the upper arm area has local Some patients have subcutaneous ecchymosis and bruising, which is due to bleeding caused by vascular injury after the fracture, and the blood seeps into the subcutaneous ecchymosis, resulting in skin color change; 3, local upper arm movement disorder; 4, patients with severe fracture displacement have upper limb deformity, such as fracture end displacement on the skin or rotation resulting in normal upper limb appearance change, due to more nerves in the upper limb, rotation may affect the nerves, such as median nerve, radial nerve, ulnar nerve, etc. causing a series of neurological symptoms. Therefore, it is important for patients to seek medical attention as soon as possible after a humeral stem fracture occurs.