Creatinine 57μmol / L belongs to the normal range, generally not serious. China’s adult male creatinine normal value of 53 to 106 μmol / L, women’s normal value between 44 to 97 μmol / L, different hospitals specific values are still different. Creatinine is a toxic product of muscle metabolism, mainly excreted by the kidneys, creatinine index is an important indicator to reflect the renal function, can be elevated or decreased. 1. Elevated creatinine: in the case of high creatinine, there may be impaired renal function, which is common in chronic renal failure, acute renal failure, acute nephritis, glomerular disease, etc. In addition, creatinine may be temporarily elevated in the case of strenuous and massive exercise and excessive consumption of meat. 2. Decreased creatinine: mainly seen in anemia, leukemia, malnutrition, long-term vegetarians, severe congestive heart failure and taking thiazide drugs. When the patient appears creatinine value is high or low, need to actively go to the hospital, the doctor under the guidance of the perfect examination, clear cause for targeted treatment, so as not to delay the condition.