Neuralgia in the left ear is clinically common in the following diseases. First, the patient may be due to fire and stay up all night, emotional tension, stress and so on neuralgia, this situation clinically do oropharynx, ear and scalp around the examination, are not found abnormal. For this situation, clinically there is no good medicine for treatment. It is generally recommended that the patient rest, usually slowly can be good. Second, herpes zoster virus infection early neuralgia, this case must pay attention to observation, patients are paroxysmal pain, general pain after 3 days of time, may be in the auricle or scalp inside the change of herpes zoster, the clinical need for antiviral and other symptomatic treatment. Third, some patients have pain in the throat, radiating to the ear, appearing periauricular neuralgia. This patient may be secondary to acute tonsillitis, parapharyngeal infection, etc., the patient swallowing pain in the pharynx radiates to the ear, appearing ear neuralgia, generally do ear examination, the ear itself and the ear canal tympanic membrane has no inflammation and infection manifestations.