Kidney Infection Symptoms, Causes, Diagnosis, Treatment

Kidney Infection: Symptoms, Causes, Diagnosis & Treatment

Kidney infection symptoms

Kidney Infection Symptoms: Bacteria often infect the bladder or the urethra and spreads to one of the kidneys.

Women are most commonly affected by a kidney infection, as are pregnant mothers, children under 2 years of age, and individuals aged over 60 years.

Kidney infections affect an estimated 3 to 4 men in every 10,000 and 15 to 17 in every 10,000 women.

This article will explain the symptoms of a kidney infection and how it is diagnosed, prevented, and treated.

Kidney Infection Symptoms

Symptoms of a kidney infection include:

  1. Blood or pus in your pee
  2. Fever and chills
  3. Loss of appetite
  4. Pain in your lower back, side, or groin
  5. Upset stomach or vomiting
  6. Weakness or fatigue

You may also have some of the symptoms of a bladder infection, such as:

  1. Burning or pain when you pee
  2. A constant urge to pee, even soon after you empty your bladder
  3. Cloudy or bad-smelling urine
  4. Pain in your lower belly
  5. Peeing much more often than usual

Call the doctor if you have these symptoms, especially if you have a bladder infection and you’re not getting better.


Kidney Infection Causes

Kidney infections usually start with a bladder infection that spreads to your kidney. Bacteria called E. coli are most often the cause. Other bacteria or viruses can also cause kidney infections.

It’s rare, but an infection can also get in through your skin, make its way into your blood, and travel to your kidney. You can get an infection after kidney surgery, too, but that’s even more unlikely.

Kidney Infection Diagnosis

To confirm that you have a kidney infection, you’ll likely be asked to provide a urine sample to test for bacteria, blood or pus in your urine. Your doctor might also take a blood sample for a culture — a lab test that checks for bacteria or other organisms in your blood.

Other tests might include an ultrasound, CT scan or a type of X-ray called a voiding cystourethrogram. Avoiding cystourethrogram involves injecting a contrast dye to take X-rays of the bladder when full and while urinating.


Kidney Infection Treatment

Antibiotics for kidney infections

Antibiotics are the first line of treatment for kidney infections. Which drugs you use and for how long depend on your health and the bacteria found in your urine tests.

Usually, the signs and symptoms of a kidney infection begin to clear up within a few days of treatment. But you might need to continue antibiotics for a week or longer. Take the entire course of antibiotics recommended by your doctor even after you feel better.

Doctors might recommend a repeat urine culture to ensure the infection has cleared. If the infection is still present, you’ll need to take another course of antibiotics.

Hospitalization for severe kidney infections

If your kidney infection is severe, your doctor might admit you to the hospital. Treatment might include antibiotics and fluids that you receive through a vein in your arm (intravenously). How long you’ll stay in the hospital depends on the severity of your condition.

Treatment for recurrent kidney infections

An underlying medical problem such as a misshapen urinary tract can cause you to get repeated kidney infections. In that case, you might be referred to a kidney specialist (nephrologist) or urinary surgeon (urologist) for an evaluation. You might need surgery to repair a structural abnormality.

Lifestyle and home remedies

To reduce discomfort while you recover from a kidney infection, you might:

Apply heat. Place a heating pad on your abdomen, back or side to ease the pain.

Use pain medicine. For fever or discomfort, take a nonaspirin pain reliever such as acetaminophen (Tylenol, others) or ibuprofen (Motrin IB, Advil, others).

Stay hydrated. Drinking fluids will help flush bacteria from your urinary tract. Avoid coffee and alcohol until your infection has cleared. These products can worsen the feeling of needing to urinate.


Preparing for your appointment

You’ll likely start by seeing your family doctor or a general practitioner. If your doctor suspects your infection has spread to your kidneys, you might be referred to a doctor who treats conditions that affect the urinary tract (urologist).

What you can do

When you make the appointment, ask if there’s anything you need to do in advance, such as restrict your diet for certain tests.

Make a list of:

Your symptoms, including any that seem unrelated to the reason for which you scheduled the appointment, and when they began

Key personal information, including recent life changes, such as a new sexual partner, and whether you’ve had previous urinary tract or kidney infections

All medications, vitamins and other supplements you take, including doses

Questions to ask your doctor

Take a family member or friend along, if possible, to help you remember the information you’re given.

For kidney infection, questions to ask your doctor include:

What is the likely cause of my kidney infection?

What tests do I need?

What treatment do you recommend?

What are the potential side effects of treatment?

Will I need to be hospitalized?

How can I prevent future kidney infections?

I have other health conditions. How can I manage them together?

Are there brochures or other printed material I can have? What websites do you recommend?

Don’t hesitate to ask other questions.


What to expect from your doctor

Your doctor is likely to ask you questions, such as:

Have your symptoms been continuous or occasional?

How severe are your symptoms?

What, if anything, seems to improve your symptoms?

What, if anything, appears to worsen your symptoms?


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