Most kidney infections start off as a Urinary Tract Infection (UTI) caused by bacteria entering the body via the urethra. You can read more about UTIs, causes, prevention and treatment here.
The infection irritates the bladder, generating a strong and urgent sensation to urinate.
A burning sensation when urinating is often associated with UTIs and kidney infections in women and men, but can be symptom-free in children and the elderly. In those cases, fever, nausea and a general feeling of being unwell may be all that’s present. In all cases, medical attention should be sought.