Nerve pain behind the left ear may be a physiological phenomenon, or it may be a symptom of certain diseases, such as acute otitis media, etc., and you should consult a doctor in time to find out the cause of the disease. 1. Physiological factors: Because the patient has been in a highly stressful environment for a long time, life and work pressure is too high, rest is not good and thus nerve pain, it is recommended to adjust the work and rest, to ensure sufficient rest time. 2. Pathological factors: Neuralgia behind the ear caused by acute otitis media may also cause ear pain, discharge of secretions from the ear canal, hearing loss, tinnitus and other symptoms. Nerve pain behind the left ear may also have other causes, such as acute tympanitis, but this symptom alone is not enough to diagnose the disease. It is recommended that the patient consult a doctor in a timely manner to clarify the cause of the disease under the guidance of a professional doctor and give targeted treatment.