Kidney infection - Symptoms of kidney infection
NHS Choices Medical Reference
The symptoms of a kidney infection usually develop quite quickly over a few hours or days.
Common symptoms include:
- pain in your side
- pain and discomfort in your lower back and around your genitals
- high temperature (it may reach 39.5ºC or 103.1ºF)
- feeling very weak or tired
- loss of appetite
- feeling sick
- being sick
You can also have other symptoms if you also have cystitis or urethritis (an infection of the urethra). These additional symptoms may include:
- pain or a burning sensation during urination
- the need to urinate frequently or urgently
- feeling that you're unable to urinate fully
blood in your urine
- cloudy or foul smelling urine
- pain in your lower abdomen
Children with a kidney infection may also have additional symptoms such as:
- a lack of energy
- poor feeding and/or vomiting
- not growing at the expected rate
- abdominal pain
jaundice (yellowing of the skin and whites of the eyes)
blood in the urine
- unpleasant smelling urine
When to seek medical advice
Contact your GP if you have a high temperature, persistent pain, or if you notice a change to your usual pattern of urination. Contact your GP immediately if you think your child may have a kidney infection.
If you have blood in your urine, you should always see your GP so that the cause can be investigated.
Kidney infections require prompt treatment with antibiotics to help relieve symptoms and prevent complications developing.
Your GP can carry out some simple tests to help diagnose a kidney infection.
See diagnosing kidney infections for more information.