Pain behind the left ear requires clarification of the exact nature of the pain before a preliminary determination can be made as to what the cause is. For example, if the local pain is persistent, it is due to inflammation of the external ear canal or middle ear, resulting in this condition. Depending on the severity of the inflammation, cephalosporin anti-inflammatory drugs can be chosen for oral or infusion treatment, and topical anti-inflammatory ear drops, such as Telbital ear drops, can be used topically on the ear. If the pain is intermittent and pinprick-like, consider it to be caused by neuralgia. Pay attention to rest, adjust the work and rest routine, avoid spicy and stimulating food, avoid bad habits such as smoking and alcohol, you can use nerve-nourishing drugs, usually choose B vitamins, and some pain is more serious, you can also use painkillers as appropriate to improve the symptoms.