have had a kidney transplant(particularly in the first three months after the transplant)
have a weakened immune system
developed the kidney infection while in hospital
Some of the main complications of kidney infections are outlined below.
Complications of a kidney infection
Kidney abscess
A kidney abscess is a rare, but serious, complication of a kidney infection, where pus develops inside the tissue of the kidney.
You’re thought to be most at risk of developing a kidney abscess if you have diabetes.
Kidney abscess
The symptoms of a kidney abscess are similar to those of a kidney infection. The most common are:
a high temperature of 38C (100.4F) or above
chills
abdominal pain
loss of appetite
pain when passing urine
Kidney abscesses are potentially serious because the bacteria inside the abscess can spread to other parts of your body, such as your bloodstream or lungs, and can be fatal.
Smaller abscesses can usually be treated with antibiotics through a drip. Surgery is usually required for larger abscesses. This involves draining the pus out of the abscess using a needle that’s inserted into the kidney
The symptoms of a kidney abscess
Blood poisoning
Blood poisoning (also called sepsis) is another rare, but potentially fatal, complication of a kidney infection. It happens when bacteria spreads from the kidneys into the bloodstream. Once bacteria are in your blood, the infection can spread to any part of your body, including all of the major organs.
In someone with a kidney infection, the symptoms of blood poisoning include:
high temperature or lower body temperature than usual (under 36C, or 96.8F)
pale skin
rapid heartbeat
breathlessness
the symptoms of blood poisoning
Blood poisoning is a medical emergency that usually requires admission to a hospital intensive care unit (ICU) while antibiotics are used to fight the infection.
If you’re taking certain medications for diabetes, such as metformin or angiotensin-converting enzyme (ACE) inhibitors, they may be temporarily withdrawn until you recover. This is because they can cause kidney damage during an episode of blood poisoning.
Severe infection
Another rare, but potentially fatal, complication of a kidney infection is a condition called emphysematous pyelonephritis (EPN).
EPN is a severe infection, where the tissues of the kidneys are rapidly destroyed and the bacteria causing the infection begin to release a toxic gas, which builds up inside the kidneys.
The exact cause of EPN is unclear, but almost all cases are in people with diabetes.
The usual treatment is emergency surgery to remove some, or all, of the affected kidney. It’s possible to live a full and active life with only one kidney.
Severe infection
Kidney failure
In very rare cases, a kidney infection can cause severe kidney damage that results in kidney failure. This is when the kidneys stop working properly.
