Answer:
Acute pyelonephritis
Explanation:
Acute pyelonephritis is a kidney parenchyma bacterial infection which can endanger the kidney and/or life and quite often progresses to scarring of the kidney.
The bacteria have typically risen from the lower urinary tract in these instances, but can also enter the kidney through the bloodstream.
Acute pyelonephritis symptoms usually develop quickly over a couple of hours or a day. It might cause increased fever, urinary pain and abdominal pain that exudes to the back along the side.