When patients experience pain in the left ear area, there can be multiple causative factors or influencing factors, most commonly acute inflammation of the external ear canal or acute otitis media. Patients often use excessive force when digging their ears, causing congestion, breakage, and secondary infection of the skin of the external ear canal, resulting in swelling and pain in the skin of the ear canal. In addition, patients may also suffer from acute inflammatory infectious diseases of the respiratory tract, which can cause secondary occurrences such as acute otitis media. Some patients may have chronic suppurative otitis media and other chronic tympanic membrane perforation, and they may also have acute attacks of middle ear inflammation due to the entry of various contaminating fluids and other substances into the ear canal, which may also cause a certain degree of ear pain.