The normal value of urinary creatinine in women is 5.3-15.9 mmol/24 h. Creatinine is produced by muscle metabolism and can be circulated in the blood after it is produced by the body, with most of it being excreted through the filtration of the kidney glomeruli and some through the re-secretion of the renal tubules. The urine creatinine value is affected by many factors, including kidney function, muscle mass, exercise, and diet, so it fluctuates greatly. If a woman’s urine creatinine level increases, it may be due to increased production or excretion of creatinine. If a woman’s urine creatinine level decreases, there may be diseases such as renal insufficiency. I. Elevated urine creatinine level: 1. Increased production: If women exercise too much or eat a lot of meat, muscle metabolism is high and more creatinine is produced, the creatinine excreted in the urine may increase; 2. Increased excretion: Women are in the early stage of diabetic nephropathy, the glomerular filtration rate is elevated, and at this time the creatinine excretion in the urine increases and shows an increase in urine creatinine. In addition, the kidney function burden of pregnant women is increasing, the glomerular filtration rate may be increasing, and the discharge of urinary creatinine may increase. The level of urine creatinine is reduced: 1, renal insufficiency: including acute and chronic renal insufficiency, because the glomerular filtration rate of women with renal insufficiency is reduced, the blood creatinine discharge is reduced, the blood creatinine level can be increased, and the urine creatinine level can be reduced; 2, other diseases: such as hyperthyroidism, anemia and other diseases, can also lead to a decrease in the level of urine creatinine.