SCR in medical terms means blood creatinine. Creatinine is an indicator of kidney function, and there are increases and decreases in creatinine. An increase is clinically significant and indicates renal failure. If the decrease is not clinically significant, it may be caused by poor nutrition or long-term consumption due to malignant wasting disease. If elevated creatinine is found, we need to actively search for the cause. The more common ones are acute renal failure caused by acute tubular necrosis or acute glomerulonephritis, and chronic renal failure caused by chronic glomerulonephritis, diabetic nephropathy and hypertensive nephropathy. Of course, the prognosis of acute renal failure and chronic renal failure are not the same, so the discovery of elevated creatinine should first clarify whether it is acute renal failure or chronic renal failure, and then further search for the specific cause of the disease.