So, at the age of 47 I really thought I would be past this but I have got a spotty back lately. All my tops seem to be low cut at the back and I can't wear them. I seem to have several spots 'under the skin' so not that bad but also a couple of bright red angry big ones. What could be causing it and how should I treat them? Have been using a back scrubby thingy and dabbing with tea tree oil if I can reach (no partner to reach for me) but it doesn't seem to be getting better.