Yesterday I felt a few small bumps behind my ear. I assumed it was pimples and ignored it.
Today there are a lot more of them! They are mostly behind both ears, a few on top of my ears and some down the sides of my neck near my hairline. They are pretty small and pink. They only itch a little bit, but sometimes when I touch them or bend my ears they hurt.
I've only done two things differently in the past few days. A few nights ago I switched to a different pillow. It was one I've used in the past but it's been sitting around for a while. The other thing is that yesterday I went to a pool with a group of 80 elementary school students. I don't know if either of those could have caused this, but I just wanted to include everything.
So what could this be, and how can I treat it?
Thanks.