The anatomical location of the lateral epicondyle of the humerus is located at the lateral elevated condyle of the lower end of the humeral body, 2 to 3 centimeters above the elbow joint. The epicondyle of the humerus is the starting point for the forearm extensor muscles, such as the ulnar extensor carpi radialis, radial extensor carpi radialis, and brachioradialis, which all originate from the epicondyle of the humerus. Excessive strain on these muscles, falls, and heavy lifting can lead to epicondylitis, which is characterized by significant tenderness on the lateral aspect of the elbow joint. The epicondyle of the humerus is also a site where trauma can easily lead to fracture. After a fracture of the epicondyle of the humerus, the broken end of the fracture can easily be displaced and flipped to varying degrees, due to the pulling of the extensor muscles of the forearm on the epicondyle of the humerus. Epicondylitis of the humerus should be treated with painkillers or local closure under the guidance of a doctor. Epicondylar fracture of the humerus with displacement needs to be treated with internal fixation.