Urine protein 3 + without any symptoms suggesting proteinuria, divided into physiological and pathological causes. Physiological is not serious, pathological is more serious, should be actively looking for causes of elevated urinary protein. 1. physiological: strenuous exercise, cold and other physiological state, can cause temporary, mild proteinuria, this proteinuria can be eliminated with the elimination of factors affecting the physiological response of the body and the recovery of renal function and disappearance, generally not serious. 2. Pathological: this kind of situation is more serious. Urine protein 3 + is a qualitative diagnosis, should be further improved 24h urine protein quantification, renal function, renal ultrasound and other tests, if necessary, improve the renal biopsy examination, to further clarify the cause of elevated urine protein. Urine protein 3 + patients without any symptoms should go to the hospital in time, under the guidance of a professional physician treatment.