Foam in the urine and the duration can not be used to determine whether the proteinuria, proteinuria needs to be determined by urine routine, urine protein quantitative examination. Foam in the urine and foam duration and proteinuria are not directly related, some proteinuria patients may have foam in the urine, there are some proteinuria patients do not have foam in the urine, in addition, proteinuria patients may be accompanied by symptoms such as edema, elevated blood pressure, and often do not have the typical symptoms, so the diagnosis of proteinuria is still need to be based on the routine urinalysis, urinalysis protein quantitative examination to determine. Normal people’s urine discharge protein no more than 150mg per day, if more than 150mg for proteinuria, when urine routine urine protein qualitatively positive or urine protein quantitative more than 150mg/24h is proteinuria. There are many causes of proteinuria, including glomerulonephritis, tubulointerstitial disease, and physiologic causes such as exercise and stress. The presence of foam in the urine can not determine whether the proteinuria, it is recommended to carry out routine urine or urine protein quantitative examination, timely medical attention to clarify the cause, under the guidance of physicians and active treatment.