Increased white foam in the urine is usually referred to as proteinuria. This is because some patients are seen because of the increased foam in the urine. Routine examination of the urine is performed and the presence of proteinuria is found, and individual patients can reach a large amount of urine protein. Foamy urine can be seen in the following cases: 1, normal people can flush up a lot of foam due to more urgent urination, but it disappears soon after resting; 2, proteinuria caused by chronic kidney disease has more foam in the urine, which does not disappear easily after resting, and is often accompanied by clinical symptoms related to edema, hypertension, hematuria, etc. Therefore, for the appearance of foam in the urine, it is important to conduct a timely examination of the urine to detect the presence of pathological proteinuria early.