Creatinine 90~110μmol/L, usually creatinine 90μmol/L is normal, but it may be a bit high in the elderly, creatinine 110μmol/L is a bit higher than the upper limit of normal value, due to the different testing methods, different hospitals have different creatinine standard, you need to see whether it is normal or not according to the standard of the hospital. Creatinine is an indicator for evaluating kidney function, the normal value is 53~106μmoI/L for men and 44~97μmol/L for women, and the upper limit of creatinine for the elderly is usually 88.4μmol/L. When creatinine value exceeds the normal value, it means that the kidneys have different degrees of damage. In the staging of chronic renal insufficiency in China, creatinine value of 133~177μmoI/L indicates the stage of compensated renal function, creatinine value of 186~442μmoI/L indicates the stage of uncompensated renal function, creatinine value of 451~707μmoI/L indicates the stage of renal failure, and creatinine value of more than 707μmoI/L indicates the stage of uremia. When abnormal creatinine value occurs, you should go to the hospital for examination and treatment in time, and check whether there is chronic kidney disease, cooperate with the doctor for early treatment, so as not to affect the renal function.