If you have foam in your urine, you should register with a nephrologist. Among the urine of normal people, there is also a certain amount of foam, mainly because the tension of the surface of the liquid has changed. The urine contains a lot of metabolic wastes, such as creatinine, urea and uric acid, so some foam will appear. However, in normal human urine, after a few minutes of resting, the foam usually disappears. If there is a significant increase of foam, like laundry detergent or beer foam, be alert to the increase of foam in urine caused by urine protein. If there is positive urine protein, it indicates related kidney diseases, such as nephrotic syndrome, chronic glomerulonephritis, etc. Further examination of 24h urine protein quantification, kidney ultrasound, creatinine, urea and other related indicators is needed. If necessary, kidney puncture is done to clarify the specific pathological diagnosis. In terms of treatment, mainly according to the different etiology, choose the targeted treatment plan.