Many people will appear in the urine routine protein +-, +, or even 2+, 3+, and they do not have any discomfort, they are worried about whether there is nephritis, uremia and other serious diseases, positive urine protein is nephritis? Many diseases can lead to positive urine protein, there are also certain physiological conditions can lead to, and even some test “errors” can also appear positive urine protein, the following is a brief introduction to the following can lead to several cases of urine protein: 1, physiological conditions, such as high fever, strenuous exercise, cold can cause a transient urine protein; 2, urinary tract Infection, prostatitis, female gynecological inflammation contaminated urine samples, after active treatment of the original disease, urine protein will disappear; 3, a variety of glomerulonephritis, interstitial nephropathy, secondary nephropathy, at this time urine protein may be intermittent or persistent, further examination of kidney function, urine protein quantification, urinary ultrasound, related antibodies, etc., and even need a kidney biopsy to clarify the diagnosis and assist in treatment; 4, erectile Proteinuria (postural proteinuria), Nutria phenomenon can also appear as a small amount of urine protein; 5, urine PH > 8.0, or the application of certain drugs, such as sulfonamides, contrast agents and high doses of penicillin can affect the results and cause false positives; so many conditions can appear urine protein, so how should the diagnosis be confirmed? First of all, you should avoid routine urine examination under high fever, strenuous exercise, cold, taking medication, etc. If urine protein is positive, you need to recheck urine routine, and if it is still positive, you need further urine protein quantification, kidney function, blood routine, urinary ultrasound, urine protein spectrum and other related examinations to confirm the diagnosis.