The precautions for kidney function test include the following: First, it is recommended not to have a large amount of protein diet 3 days before the kidney function test, and to eat a light diet, avoid high-fat and high-protein foods, and avoid spicy and stimulating foods. Second, try to fast for 8-12 hours. Because hormones, drugs, gastrointestinal discomfort, etc. will affect the results of kidney function tests. Third, it is recommended to retain the morning urine, which is deposited in the bladder for at least 4 hours and has a good significance for urine specific gravity and other tests, and it is also recommended to send the specimen for examination immediately to prevent contamination of the specimen. After the examination, patients actively go to the regular hospital for professional doctor’s guidance.