I am 21 years old and recently I discovered a lump behind my left ear. However, I'm not even sure if its a lump or not or bone. I have been examining it for a week and it feels like it changes size like its get bigger then smaller then bigger then smaller esp if I touch it too much it feels like it swells a little. The lump doesn't hurt and feels like it could be the size of a pencil eraser. I don't know if this helps, but last year I had to have a biopsy on the left side of my neck for a lymph node that was swollen for months and the results came back benign. I even recently had a physical 2 weeks ago and everything came back normal except I have low Vitamin D, but I am in good health. I don't know how long this lump could have been there. It could have been there since last year for all I know. I don't ever go behind my ears. I just happened to feel the lump because I had an itch by my hairline going to my ear and that's when I felt something, but I'm not sure if its even normal.
Should I be worried? I was doing research online and it freaked me out about swollen lymph nodes and ear cancer etc. Could there be a connection to the lump that was removed on the left side of my neck and now there is a lump behind my left ear? If the lump on the left side of my neck came back benign shouldn't that mean all lumps in my head and neck on the left side should be benign? Once again don't know how long its been there and I do suffer from allergies and have asthma so I don't know if thats connected too and my ears tend to itch on the inside too. Also there is no pus, no leakage, no bruising nothing. It just feels like its under my skin. I don't think its noticable.