Frothy urine is not necessarily a sign of renal failure, such as physiological causes of increased urinary foam is not a sign of renal failure, such as pathological factors such as glomerulonephritis, the progress of the disease may lead to renal failure. Physiological factors: the reason for the increase of urine foam is that the urine contains more protein, the physiological reasons for the increase of protein in the urine include disease, exercise, mental stress, etc., which can be relieved by itself. Pathological factors: various primary glomerulonephritis such as membranous nephropathy, IgA nephropathy, etc. or secondary glomerulonephritis such as diabetic nephropathy, hypertensive nephropathy, there will also be more urine foam, but this is not necessarily renal failure, only when the disease progresses to a certain degree, according to the creatinine, glomerular filtration rate, and other indicators to determine whether it is renal failure. It is recommended that patients with increased urine foam go to the hospital in time to improve the relevant examinations under the guidance of the doctor, if it is caused by pathological factors, it should be actively treated to avoid the progression of the disease.