you have left flank pain and burning micturition..
this could be due to renal stone/pyelonephritis
see your urologist
for the analysis of the condition and the treatment..
need to get one urine examination and ultrasound examination..
later on management is based on the report..renal calculi
based on the stone size, either hydrotherapy/lithotripsy
if there is infection antibiotics is needed..
drink lot of fluids..