The symptoms of a kidney infection usually develop quite quickly over a few hours or days.
Common symptoms include:
- pain and discomfort in your side, lower back or around your genitals
- a high temperature
- shivering or chills
- feeling very weak or tired
- loss of appetite
- feeling sick or being sick
You may have other symptoms if you also have a urinary tract infection (UTI) such as cystitis.
These additional symptoms may include:
- pain or a burning sensation when peeing
- need to pee suddenly or more often than usual
- blood in your pee
- smelly or cloudy pee
- pain in your lower tummy
- pain in your genitals
In older people, a kidney infection may cause confusion.
Symptoms in children
Children with a kidney infection may have the following symptoms:
- smelly pee
- blood in their pee
- wetting the bed
- a high temperature and feeling unwell (they may complain of tummy ache)
- being sick and/or not feeding well
A child younger than 2 with a kidney infection may only have a high temperature, without any other obvious symptoms.
When to see a GP
See a GP if you feel feverish and you have pain in your tummy, lower back or genitals that will not go away.
Contact a GP immediately if you think your child may have a kidney infection.
Kidney infections require prompt treatment with antibiotics.
Page last reviewed: 06 January 2021
Next review due: 06 January 2024