The patient’s urine protein 0.3g/L indicates a small amount of protein in the urine, caused by kidney-related diseases, which can be further checked for kidney function, 24-hour urine protein quantification and other indicators to initially understand the condition. Common causes of urine protein include chronic nephritis, diabetic nephropathy, hypertensive kidney damage and so on, and treatment plans need to be formulated according to the specific condition and cause. ACEI or ARB drugs are generally preferred, and it is also important to monitor the changes of related indicators during the medication. Urine protein is an important indicator to assess kidney disease. If urine protein is not controlled, it may damage the kidneys and even develop into renal failure and uremia. Once the condition enters the uremic phase, dialysis treatment is required.