When I walk,bend too much or lift awhile I get burning sensation in lower back,buttocks and upper hamstrings, last a short while but keeps reaccuring,I cannot walk very far,I sometimes feel like I going to fall,but haven’t yet,legs get very weak at times,hurts a great deal,I’m very concerned,my new Doctor and I am working on this,I hope we can find a salutation soon.
Get MRI scan of your back. May be sciatica.