Kidney infection (pyelonephritis) is a specific type of urinary tract infection (UTI) that generally begins in your urethra or bladder and travels up into your kidneys.
A kidney infection requires prompt medical attention. If not treated properly, a kidney infection can permanently damage your kidneys or spread to your bloodstream and cause a life-threatening infection.
Kidney infection treatment usually includes antibiotics and often requires hospitalization.
Signs and symptoms of a kidney infection may include:
- Back, side (flank) or groin pain
- Abdominal pain
- Frequent urination
- Strong, persistent urge to urinate
- Burning sensation or pain when urinating
- Pus or blood in your urine (hematuria)