Creatinine includes blood creatinine and urine creatinine, while the commonly referred to creatinine, if not specifically stated, mostly refers to blood creatinine. Blood creatinine can accurately reflect the impaired kidney function, and we usually also use blood creatinine to assess kidney function. Blood creatinine is one of the three routine renal function tests, which include urea nitrogen, creatinine and uric acid. The lab fee alone is about 80 RMB, and when abnormal blood creatinine is found, further testing is needed according to individual condition, and some optional items such as blood routine, urine routine, blood sugar, immunology test, antibody complement test, and urinary ultrasound may be required to clarify the condition. The simple urine creatinine test is also about$20, but decreased urine creatinine is mainly seen in uremia, or lack of protein intake in the diet, hypoproteinemia, etc. Increased urine creatinine, on the other hand, can be seen in acromegaly, gigantism, diabetes, infection, hypothyroidism, eating meat sports, or intake of certain drugs such as vitamin C, levodopa, methyldopa, etc.