Here is some helpful advice, b/c I thought I had cancer at one point too...Cancer is NOT moveable!!! That is what my doc told me. So, if you can move it, it is probably fine. May just be an infected area, or could be any number of things, but I wouldn't worry too much about Cancer. PLUS>>>it will probably be gone by Friday. Today...the back of my neck is really itchy. I am trying to let it go. Relating it to a gel I haven't used in my hair for a long time...dunno. But if it doesn't go away in a day or so...then I can be concerned. I too worry about medical things. They can be the easiest to worry about. The sides of my legs are constantly sore, and I too worry about cancer, so if it gets worse, I will def check it out. Don't worry though, that really doesn't sound like anything more than a small cyst, which are very common, and often caused by nothing. Good luck, let us know what the doc says.