Yup. Internet sites will have a list of possibles -- everything from your pants are too tight to cancer. You hone in on the worst possible scenario when mostly the cause isn't even on the list because it is really just nothing but skin being skin. Stay off the internet searching. You just feed your fears that way. Why do that to yourself? Go with what you know. You are young, healthy, and EVERYONE has aches and pains and bumps and bruises and itches and sneezes, etc. every single day that mean absolutely nothing healthwise. Rather than focus on finding some obscure health cause, work on what you are really afraid of? It probably isn't really about health but more about fear of control or authority being taken away or losing the ability to cope with life, etc. If you really were sick, what would you get out of that?