What Could A Distinctive Lump Below The Ear (anti-helix) Indicate?

Hello, I have a hard lump in my ear, just under the skin/cartilage of the concha or anti-helix. It seems to be a lump either on the cartilage or on the bone underneath it since I can hear them rubbing against each other when I move my ear. The sound is distinctively different from that which I hear when moving the other ear and if I push down on the ear at all hard, there is slight sensitivity in the place where I am guessing the bump is, or whatever it is that causes this sensation. I noticed it some months ago, perhaps over a year ago, I can't remember when. I didn't think much of it at the time but since it is still there and seems to be more noticeable (i.e. painful) now, I thought I would find out about it.