causes of kidney pain
Kidney pain is caused by infection, inflammation, injury or enlargement of the kidney, or by conditions that block the flow of urine out of the kidney. Pyelonephritis (kidney infection) and kidney stones are the most common causes of kidney pain. Pyelonephritis is often accompanied by other symptoms of urinary tract infection, such as burning with urination, frequent or urgent need to urinate, bloody urine, fever, and nausea with or without vomiting.
Kidney damage due to a blocked artery is a rare cause of kidney pain, as is poststreptococcal glomerulonephritis, an uncommon complication of streptococcal infections, such as strep throat (bacterial throat infection) and impetigo. Some conditions that cause kidney pain can have serious complications.
1 Kidney pain and back pain can be difficult to distinguish, but kidney pain is usually deeper and higher in the back located under the ribs while the muscle pain with common back injury tends to be lower in the back.  Causes of kidney pain are mainly urinary tract infections and kidney stones.