5 Signs You Might Have a Kidney Infection

Talk with your doctor if you notice signs of a kidney infection. Photo Courtesy: Jose Luis Pelaez Inc/DigitalVision/Getty Images

Kidney infections (also called pyelonephritis) are a type of urinary tract infection (UTI). They happen when harmful bacteria move up into the kidneys. Kidney infections can usually be treated with antibiotics — but without treatment, they can cause serious damage and other health problems. That’s why it’s important to know the symptoms and get treatment right away.

Back and Flank Pain

Back pain is a common kidney infection symptom. Photo Courtesy: Peter Dazeley/The Image Bank/Getty Images

Back pain and pain in the flank area (the sides of the lower back and abdomen) are common signs of a kidney infection. Some people also have pain in the groin. Pain in these areas doesn’t always mean a kidney infection — but if you have back or flank pain along with a fever or other symptoms, call the doctor right away.

Pain When Peeing

If you have pain when peeing, see your doctor. Photo Courtesy: Jim Craigmyle/Stone/Getty Images

Pain when peeing and trouble peeing are common symptoms of kidney infections and other UTIs. Some people notice a burning feeling when they try to pee. It’s also common to feel like you need to pee again right away, even after you just went. These symptoms can also happen with other types of UTIs, so it’s important to see your doctor to find out what’s causing your symptoms.

Bloody, Cloudy or Foul-Smelling Pee

You may need a urine test to check for signs of kidney infection. Photo Courtesy: Karl Tapales/Moment/Getty Images

Similar to bladder infections, kidney infections can cause bloody, cloudy or foul-smelling pee (urine). Some people notice that their pee has a pinkish color or looks cloudy or milky in the toilet. There may be pus or blood in your pee, or it may have a foul or unusually strong smell.

Fever and Chills

Fever can be a sign of a kidney infection. Photo Courtesy: Tom Le Goff/DigitalVision/Getty Images

Fever and chills are common symptoms of a kidney infection. Some people may also have nausea and vomiting. If you think you may have a kidney infection and you have a fever of 102 degrees Fahrenheit or higher, get medical help right away.


Mental symptoms like confusion are more common in older adults. Photo Courtesy: CasarsaGuru/E+/Getty Images

Kidney infections can also cause mental confusion, especially in people over age 65. Older adults may have symptoms like hallucinations, jumbled speech or dizziness. Some may also lose their balance and fall. Confusion is often the only symptom in older adults with kidney infections — so it’s easy to mistake for aging-related memory issues or early signs of dementia.

How to Prevent Kidney Infections

Drinking plenty of water can help prevent kidney infections. Photo Courtesy: Jessica Peterson/Getty Images

Follow these tips to help prevent UTIs and kidney infections:

  • Drink lots of fluids.
  • Pee whenever you need to — don’t hold it in.
  • Always wipe from front to back — never from back to front.
  • Try to pee soon after sex.

Remember, it’s important to treat kidney infections right away before they cause serious health problems. Knowing the common signs and symptoms of kidney infections can help you get the treatment you need.

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