Symptoms of elbow ligament injury include pain, swelling, impaired mobility, deformity and other manifestations. 1. Pain: elbow ligaments are attached to the bony structures near the elbow joint, when there is ligament injury such as pulling injury, rupture or stop point avulsion fracture, etc., it will stimulate the injured ligaments to show active pain due to elbow joint activities. In addition, there is pressure pain at the site of the ligament injury. MRI of the elbow joint can be performed to understand the elbow ligament injury. 2. Swelling: elbow ligament injury will be accompanied by other tissue damage, such as joint capsule, tendon, muscle and other injuries, after the injury will be due to local inflammatory stimulation of tissue fluid leakage, resulting in elbow joint swelling. 3. Activity disorder: elbow ligaments are not only involved in elbow flexion and extension activities, but also play an important role in the stability of the joint. Ligament injury may cause elbow flexion and extension activities, such as flexion and extension disorder. 4. Deformity: when elbow ligament rupture or avulsion fracture, such as the rupture of the medial or lateral ligament, it will cause the elbow joint externally turned or internally turned deformity. Elbow ligament injuries should be treated as early as possible to promote healing and restore elbow joint function.