Why did you decide to post on the cancer community? It seems to me there may be other better communities. One doesn't come to mind, try a search on your subject line and see if there is any thread/community that has discussed that issue.
There is nothing in your brief post that makes me suspect cancer...but I am no expert on cancer, I come here to learn and to share any comfort or experience I have to offer.
I looked at this post simply because it has gone without a reply, hope this helps you find some useful inputs.
Merry Christmas
It is not cancer i think. I am not a specialist but still i can say it is not cancer because you have hard lump behind your left ear which is a general issue if we think positively. It is because of cold, nothing else