A bout of nerve pain at the back of the ear can first be considered as a result of inflammation. Inflammation of the external auditory canal, ear neuralgia, otitis media and other diseases. For the postauricular root neuralgia need to be clearly diagnosed, symptomatic treatment, and actively go to the hospital with medication. 1. Inflammation of the external auditory canal: Posterior root neuralgia is caused by inflammatory diseases of the external auditory canal such as boils of the external auditory canal and acute diffuse otitis externa, which will manifest the pain in the posterior root of the ear. 2. Otoneuralgia: Otoneuralgia is mainly distributed in the front and back of the auricle and the external auditory canal, and its postauricular radicular neuralgia is characterized by pinprick-like throbbing pain accompanied by redness of the skin, excessive sweating, and increased salivation in the ear, etc. It is usually associated with mental factors. Ear neuralgia is generally associated with mental factors such as tension, anxiety, insomnia, etc., caused by eating irritating foods. 3. Otitis media: acute secretory otitis media or acute suppurative otitis media patients, can appear behind the ear pain performance.