I've had this rash for a few days now. It's on my lower back where there was no bathing suit, it's about 2in by 1in and when I first got it it looked just like a burn(I don't recall anything that would have caused it directly) now a few days later it seems to be sort of scabbing and crusting a little bit. Is this something to worry about? I don't think it was a bite. I'm adding a picture for reference. I'm still in jamaica and do not want to go to the hosp here.