Negative urine protein refers to the patient’s routine urine examination, the urine did not find excess protein, is a normal situation. Uroprotein is a normal component of urine, under normal circumstances, the content of urinary protein in the urine within 24 hours will not exceed 150mg, routine urine examination laboratory test results generally show negative; if more than this normal range, generally suggests that urinary protein is positive, that is, proteinuria, so urinary protein negative that is normal. If the urine protein positive, may be the patient to eat a lot of high-protein food or strenuous exercise, cold and flu caused by the impact of factors eliminated will generally return to normal. If persistent proteinuria, it may be caused by nephritis, nephrotic syndrome, polycystic kidney and other diseases. Patients with abnormal proteinuria are advised to go to a regular hospital in time and receive standardized treatment under the guidance of a physician.