Weak positive urine protein is not necessarily a sign of nephritis. It may also be physiological proteinuria or proteinuria caused by other diseases. 1. Physiological proteinuria: the human body can produce a small amount of urinary protein after fever, fatigue, strenuous exercise, young people in the special position of the spine convex, can also produce a small amount of urinary protein, at this time, most of the 24-hour urinary protein quota is not more than 1g, the body and the kidneys have no special effects. 2. Pathological proteinuria: proteinuria is divided into glomerular proteinuria, tubular proteinuria, overflow proteinuria and tissue proteinuria. Glomerular proteinuria and tubular proteinuria are indicative of renal disease. Overflow proteinuria is seen in multiple myeloma, but the patient is not nephritic. Tissue proteinuria is seen in pyelonephritis or urinary tract tumors. So weakly positive urine protein is not necessarily a sign of nephritis. Weakly positive urine protein patients are recommended to go to the regular hospital, clarify the cause of the disease, and follow the doctor’s instructions for symptomatic treatment.