Is alright to self diagnose a problem that isn't detrimental to my health at the moment?

I have a skin abnormality that just appeared (tan-ish splotches on my left arm) But they don’t itch or sting and I’m not feeling any really ill effects in any part of my body as of now. I’m not sure if I’m just being a hypochondriac over this so is it ok to just google my way into a theory as to what it is and deal with it until it clears up or gets worse? or is that ill advised, should I get a doctors opinion on this somewhat trivial new occurrence?