<human>: I have a rice sized, hard bump behind my lower left ear directly behind the lower ear lobe that seemed to appear over the last 4 months and wont go away.  It feels it is sometimes sending an infrequent pain down the side of my next that lasts for 2 seconds.
<bot>: Hi. Thanks for your query. Read and understood your history of a small rice sized hard lump behind the ear that sometimes cause 2 second sharp pain. The possibilities are:GranumolaNeurofibromaCyst on a small sensory nerveSince it is so small the ultimate treatment would be to get it excised under local anesthesia and send for histopathology examination to get a final diagnosis. Also watch for similar lumps anywhere else in the body.