Normally it is the function of the kidney to eliminate excess creatinine from our body and maintain the normal levels. Normal value
for creatinine is upto 1.2mg/dl. When
renal function is hampered by infections, stones and renal failure these parameters raise.
As your history suggests that you were suffering from ureteric colic, due to which there might have been urinary tract obstruction and mild renal functional derangement.