Back pain is very common and, in most cases, it is not of renal origin but of spinal diseases, generically called low back pain.
Renal pains are usually on one side (right or left) and project in the lower back. They are cramps of varying intensity, which can go down the front of the belly to the groin and genital region, in addition to being accompanied by other symptoms such as nausea, vomiting, and changes in the urine.
To be sure that the pain originates from the kidney, it is necessary to look for a sign called Giordano, a situation in which the nephrologist in Delhi gives small pats with the closed fist on the lumbar region (percussion fist), from top to bottom, which provokes the appearance of pain. In this case, the signal is positive, that is, the pain is probably due to kidney disease.
What are the possible causes of this pain?
The most frequent cause is the presence of stones (lithiasis), which clog the urinary tract and dilate the affected kidney (hydronephrosis), causing very severe pain that requires administration of analgesics, antispasmodics, and injectable anti-inflammatories. They are the famous renal colic that, according to popular culture, are maddening and worse than those that women feel during labor.
Also, infections of the upper urinary tract, which directly affect one or both kidneys (pyelonephritis) are causes of pain such as those described. Typical cases are accompanied by changes in urine and general symptoms such as fever, cloudy and dark urine, malaise, poor appetite, nausea, and vomiting.
Acute nephritis due to kidney inflammation can also be responsible for pain. They are bilateral and accompanied by changes in urine and even high blood pressure.