 [ Symptoms ] found a lump behind my ear thats quite painfull when i touch it its not a pimple what can it be  hello i have found a lump behind my left ear thats quite painfull when i touch it i found it about a week ago i have read about other people with the same problem and people all answered very different what do you think it could be people have mentioned cancer but like í said it was all kind of different theories [ Disease ] every person is different so without a hands on examination it is really difficult if not impossible to offer you a patient specific answer the lump could be many things from a sebaceous cyst to a reactive lymph node instead of worrying about cancer see your medical provider so you can have a definitive answer not a blind guess or list of possibilities