If creatinine is only 94 μmol/L in men, it is recommended that they can be followed up and do not need kidney preservation therapy. Creatinine is the simplest indicator of kidney function. 94μmol/L creatinine in men needs to be judged in conjunction with their glomerular filtration rate as well as their age. Under normal circumstances, the glomerular filtration rate should be >80 ml/min. If the glomerular filtration rate is <80 ml/min, there may be kidney injury at an early stage. If it is a young adult and taller, the creatinine clearance may still be normal at this time. In the case of an older male, a creatinine of 94 μmol/L may indicate that creatinine clearance has been low. Whether creatinine 94μmol/L must be treated with kidney preservation, in addition to combining creatinine, it is also necessary to determine whether there is any kidney problem, such as creatinine 94-100μmol/L, but there is no hematuria or proteinuria in the urine, plus the kidney morphology and echogenicity have not changed. Patients are advised to recheck creatinine trend in about 3 months. It can also be combined with dietary aspects, such as whether the intake of excessive meat diet, red meat such as beef and mutton contain high creatine, and creatinine will be high after consuming such food.