Health Library · Urinary & Kidney

Kidney infection symptoms

Overview

Pyelonephritis is a bacterial infection of the kidney, usually ascending from a bladder infection. It needs different antibiotics, longer courses, and sometimes hospitalization.

Symptoms to watch for

  • Fever and chills
  • Flank or back pain (one side)
  • Nausea and vomiting
  • UTI symptoms (burning, frequency)
  • Fatigue

What else could this be?

  • Simple UTI
  • Kidney stone
  • Ovarian pathology

How it's diagnosed

Urine culture, CBC. CT scan if stone suspected.

Treatment

Ciprofloxacin or ceftriaxone. Hospitalization for severe cases, pregnancy, or inability to tolerate oral meds.

When to book a visit

Book urgently — or go to an ER if you have fever with vomiting.

Book online today