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Pyelonephritis

Pyelonephritis is a serious kidney infection that requires prompt treatment. It often presents with symptoms like fever, back pain, and frequent urination.
18/05/2026
Updated: 19/05/2026
Pyelonephritis

Disclaimer: This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult with a qualified healthcare provider for any medical concerns.

Understanding Pyelonephritis

Pyelonephritis is a serious kidney infection. It is more severe than a simple bladder infection (cystitis) because the bacteria have traveled up the tubes (ureters) and established themselves in the kidney tissue. Because the kidneys are essential organs, it is crucial to treat this condition seriously and promptly to prevent complications.

Key Symptoms to Watch For

  • Fever and chills
  • Pain in the flank or side of the abdomen (often felt in the back)
  • Painful urination (dysuria)
  • Urgency or frequency of urination
  • Nausea or vomiting

Treatment and Care Options

Pyelonephritis requires medical attention to clear the infection effectively. Treatment usually involves a combination of antibiotics and supportive care.

Medical Treatment:
Most cases are treated with a course of antibiotics, which may be taken orally or given via intravenous (IV) drip in a hospital setting, especially if the patient is severely ill. Doctors may also need to administer pain relievers or fever reducers.

At-Home Care Tips:
While on antibiotics, it is vital to stay hydrated. Drink plenty of clear fluids, such as water, to help flush bacteria from your urinary system. Following your doctor's instructions on medicine dosage and duration is critical to fully eliminating the infection.

What Causes this Condition?

Pyelonephritis is primarily an infection of the kidneys. It typically starts in the urinary tract and travels upward.

The main cause is bacterial overgrowth. These bacteria usually enter the urinary system through the urethra and bladder, and from there, they ascend into the kidneys.

  • Bacterial infection (most commonly Escherichia coli or E. coli)
  • Urinary tract blockage or sluggish flow (which allows bacteria to multiply)
  • Weakened immune system or underlying urinary issues