I have ugly spots on my back and my doctor says to many birthdays. Can this be fixed? My back doesn`t have scars just brown ugly spots

Solar lentigos? Lots of people -- even older teens -- have sunspots on their upper back and I'll bet this is what you're describing. You may discover that others don't find them ugly at all, but evidence that you've had a life that included enjoying the outdoors. The Baywatch lifeguards, who exemplified physcial beauty to a generation, will reliably end up sunspotted. Is this you? Cheers.
Birth mark? For cosmetically fixing ugly spots, please consult a dermatologist of cosmetic surgeon.