Normal renal function but high urine protein may be related to kidney stones, or may be caused by other reasons, such as physiologic proteinuria, chronic nephritis and so on. 1. Kidney stone: when the patient’s kidney stone obstruction for a long time, can damage the kidneys, glomerular filtration rate decreased, resulting in large molecules of protein leakage from the urine, so it should be active in the treatment of lithotripsy, the use of drugs, extracorporeal lithotripsy or surgical removal of stones and other ways of treatment. 2. Physiological proteinuria: physiological proteinuria can occur after strenuous exercise, elevated body temperature and cold, which is a normal phenomenon, and will usually subside, so don’t worry too much about it, and you can have a regular checkup. 3. Chronic nephritis: patients with chronic nephritis often have proteinuria, edema, hypoproteinemia and other conditions, can be further quantitative examination of 24-hour urine protein, if the urine protein is more need to use under the guidance of the doctor to reduce urinary protein, the protection of renal function of the drug. It is recommended to review regularly. If kidney disease is suspected to be the cause, further renal puncture biopsy can be done to clarify the type of pathology and target medication.