Hi,
Kidney infection or pyelonephritis usually presents with frequent urination, persistent urge to urinate, burning sensation or pain when urinating, abdominal pain or pressure, cloudy urine with a strong odor, pus or blood in your urine, need to urinate
during the night, back or flank pain and fever. Are there other signs or symptoms mentioned present? It would be best to see your doctor for a urinalysis to confirm the presence of infection.