Patients with painful symptoms on the lateral side of the right elbow joint are commonly associated with inflammation of the right humeral epicondyle and trauma to the elbow joint, as follows: First, inflammation of the right humeral epicondyle: the right humeral epicondyle is the stop of the total tendon of the forearm extensor muscle, and the usual repeated force of the forearm extensor muscle will pull the local stop, resulting in the formation of chronic inflammation of the right humeral epicondyle, and patients may have local pain with limited upper limb activity, and pressing the humeral epicondyle, the pain The symptoms are aggravated by pressure on the humeral epicondyle. Second, elbow joint trauma: such as elbow joint lateral collateral ligament injury, can also be manifested as elbow joint lateral pain, swelling, elbow joint activity is limited, take MRI, can find the elbow joint lateral collateral ligament damage, serious cases also need to be repaired by surgical treatment. Therefore, patients with pain in the lateral aspect of the right elbow joint should be diagnosed and treated promptly in order to restore the function of the elbow joint and avoid serious consequences such as stiffness of the elbow joint.