Whether patients with urinary protein 3+ need to be hospitalized is related to the cause of urinary protein and the severity of the condition, if the physiological causes and mildly impaired renal function, generally do not need to be hospitalized, if the nephrotic syndrome or severe kidney damage generally require hospitalization. Normal urine routine examination of urine protein is negative, positive urine protein including physiological reasons, renal and extra-renal factors. Physiological reasons, such as short-term large amount of protein intake, mental stress, etc., at this time do not need hospitalization. Renal factors are generally considered to be caused by urinary tract infections, acute and chronic glomerulonephritis, and nephrotic syndrome, etc. Whether or not hospitalization is needed is related to the severity of the disease. If it is caused by urinary tract infection, it can be treated without hospitalization, and antibiotic treatment can be given on an outpatient basis. If it is caused by acute or chronic glomerulonephritis or nephrotic syndrome, further examination is needed to clarify the liver function, blood lipids, plasma albumin, renal function and other conditions to determine whether hospitalization is needed. In addition, patients with extra-renal factors such as multiple myeloma need to be hospitalized. If the patient is found to have positive urine protein, and the cause is not clear, need to do renal puncture to clarify the diagnosis, this situation requires hospitalization. Therefore, it is recommended that patients with 3+ urine protein should consult a doctor in time to see if they need to be hospitalized and actively cooperate with the treatment under the physician’s evaluation.