Creatinine 100umol/L in men is normal. The normal value of creatinine is between 30-110umol/L, and from here it can be seen that creatinine 100umol/L is within the normal value. However, it is also important to note that since 100umol/L is close to the upper limit of normal, then this condition should be ruled out as an early manifestation of certain kidney injuries. In some kidney diseases, the damage is not very serious in the early stage and the creatinine is still within the normal range. However, with the gradual progress of the disease, creatinine will be found to increase gradually during the dynamic review process until it shows the symptoms of toxin accumulation, such as loss of appetite, nausea and vomiting. Therefore, when the patient’s creatinine is found to be 100umol/L, on the one hand, we should dynamically observe whether the patient has some abnormal symptoms, such as edema, elevated blood pressure, increased foam in the urine, oliguria, lumbar pain, hematuria and other symptoms; on the other hand, we should dynamically review the kidney function and electrolytes to prevent further aggravation of the kidney function, especially the appearance of hyperkalemia.