Kidney Problems
The kidneys are located on either side of your spine, under your rib cage. Since your right kidney hangs a little lower than the left, it is more likely to cause lower back pain if it is infected, inflamed, or irritated.
Examples of kidney problems include kidney infections and kidney stones, which will be discussed below.
Kidney Stones
Kidney stones are solid, pebble-like structures produced from excess minerals and salts normally seen in urine. When these stones accumulate in your ureter, you may experience a sharp, cramping pain in your back, groin, and lower abdomen. The ureter is a tube that transports urine from your kidneys to your bladder. Pain that accompanies kidney stones comes and goes as the stone moves.
You may also experience other symptoms, such as painful or urgent urination. You may also find it difficult to fully empty your bladder, or you may only produce a small amount of urine when you urinate. Blood may also appear in your urine due to the sharp-edged stone cutting tissue as it goes down your ureter.