Detailed answer

A urinary tract infection (UTI) is a bacterial infection that can occur anywhere along the urinary tract, including the bladder, urethra, ureters, and kidneys. It is usually caused by bacteria entering the urinary tract through the urethra. A kidney infection, also known as pyelonephritis, is a type of UTI that specifically affects the kidneys. It occurs when bacteria from a UTI spreads to the kidneys, usually from the bladder. While both conditions share common symptoms such as frequent urination, burning sensation during urination, and cloudy or bloody urine, a kidney infection is generally more serious and requires prompt medical attention. Symptoms of a kidney infection may also include fever, back or flank pain, nausea, and vomiting. If left untreated, a kidney infection can potentially cause kidney damage or spread to the bloodstream, leading to a life-threatening condition called sepsis.