31 yr old female upper back for bout a week no other symptoms burning feeling in back what could it be if serious would i have other symptoms?

Burning feeling: Is there a rash there? Because that could be shingles. If there's no rash after a week, it's probably not shingles. Did you have any trauma? A fall or bump into something? Maybe there is a little peripheral nerve that is getting pinched in the spine. Serious symptoms would be worsening pain, fevers. If it gets worse, go see someone.