What are signs of kidney infections?

Signs and symptoms of a kidney infection (pyelonephritis) may include:

High fever

Chills

Back pain or tenderness, just below the ribs on either side of your spine

Frequent urination

Burning sensation when you urinate

Cloudy, dark, bloody or foul-smelling urine

Nausea and vomiting

Fatigue or weakness

Diarrhea

Unexplained weight loss

Seizures (rare)