I Have A Lump Behind My Ear And It Hurts A Little When I Press It What Could It Be?

I have one too. I have one in my ear where you would get it pierced I also have 3 behind my left ear. They are like lil pimples. They hurt when you touch them too. I don't know what they are but get the doctor to look at it.
I'm seeing the doc tomorrow : )

Well all you have to do is put some paw-paw cream on and then take it to see the doctor so it won't be a problem anymore

Could be a fibroma, or a cyst, or an fibroma lymph node.  A fibroma is a cyst, also, but benign.