Pain in the left ear canal is mainly considered as the following diseases: 1. Acute tympanitis, which is secondary to upper respiratory tract infection or bacterial infection in the ear canal. Such patients can be treated symptomatically with levofloxacin ear drops and oral antibiotics. 2. Acute secretory otitis media, in addition to ear pain, may be accompanied by hearing loss, ear congestion, tinnitus and other manifestations. On examination, the tympanic membrane is congested, the sign is unclear, and fluid is seen in the tympanic chamber. Clinical treatment can be symptomatic with nasal spray hormone, oral mucus promoter, oral antibiotics, local application of ear drops, etc.; 3. Ear neuralgia, such patients do not see obvious abnormalities in the ear canal tympanic membrane on examination, and mainly manifest as paroxysmal pain in the ear. Clinically, there is no good solution for this kind of patients. It is recommended that patients try not to get on fire and pay attention to rest. In conclusion, pain inside the ear can also be seen in other diseases, such as herpes zoster, radiating pain in the throat, intra-ear tumors, trigeminal neuralgia, and other diseases. For the above kinds of ear pain, it is recommended that patients go to an ear clinic with a professional otolaryngologist for a systematic examination, and then the doctor prescribes medication for symptomatic treatment.