Creatinine 107umol/L usually indicates mild kidney injury. It may be caused by physiological reasons such as higher muscle content of oneself, or eating more meat and exercising more in general, etc.; or it may be caused by pathological reasons such as acute kidney injury or chronic renal insufficiency. Creatinine is the metabolic end product of creatine in muscle tissue. Creatinine does not bind with protein in the blood and can freely pass through the glomerulus, which is the most commonly used indicator to indirectly reflect the glomerular filtration function. When glomerular filtration is impaired, the body’s serum creatinine may be elevated, suggesting the presence of renal insufficiency. Normal serum creatinine ranges from 53 to 106 μmol/L in men and from 44 to 97 μmol/L in women, and creatinine 107 umol/L is mildly high. It may be caused by their own high muscle content or physiological reasons such as eating more meat and exercising more in general; it may also be caused by acute kidney injury or chronic renal insufficiency. If patients find that the blood creatinine is elevated, it is recommended to go to regular hospitals in a timely manner, improve the examination to clarify the cause of the disease, and then give targeted treatment or therapy under the guidance of the doctor.