Causes

• Kidney infections occur when bacteria in the urinary tract multiply. Another cause of kidney infection is bacteria that spread through the bloodstream to the kidneys.
  
  

Symptoms

• Symptoms of a kidney infection include back, side, groin or abdominal pain; frequent urination or persistent urge to urinate; fever; presence of blood or pus in urine and a burning sensation when urinating.
  
  

Cranberry Juice as a Treatment for Kidney Infection

• Cranberry juice is believed to be effective in treating UTIs, which include kidney infections. Acids present in cranberries kill the infection-causing bacteria that cause UTIs. Cranberries also contain a chemical that forces bacteria in the urinary tract to release its hold on the urinary lining.
  
  

Considerations

• The amount of cranberry juice you consume when treating a kidney infection should be limited, as an excessive amount of juice can cause kidney malfunction. The Journal of the American Medical Association (JAMA) reported that women participating in a study evaluating the effectiveness of cranberry juice as a UTI treatment consumed an average of 10 oz. per day.
  
  

Warning

• The Mayo Clinic warns that a severe kidney infection can cause life-threatening complications. If you experience symptoms that include bloody urine, nausea or vomiting seek medical attention immediately.