If there is white foam during urination, which occurs once in a while, it is often due to the concentration of urine and the high concentration of metabolic waste in the urine, which results in a greater surface tension in the urine. Patients do not need to worry excessively, and can usually be relieved by drinking more water. However, if white foam often appears, or if the patient himself has a certain primary condition, it is recommended to seek medical attention and treat the cause. 1, diabetes: In patients with diabetes, the increase in sugar in the urine leads to a greater surface tension in the urine, which can easily form white foam. In this case, patients are advised to have fasting blood glucose measurement, and if fasting blood glucose reaches the diagnostic standard of diabetes, patients are advised to control their diet, moderately increase exercise, and cooperate with oral hypoglycemic drugs or insulin injection. 2. Impaired kidney function: Impaired kidney function due to various reasons, such as various types of nephritis, nephrotic syndrome, hypertension, etc., leads to impaired kidney function and affects the glomerular semi-permeable membrane, making the semi-permeable membrane degenerate. During blood filtration, the protein that should have remained in the blood enters the urine, resulting in increased urine protein and greater urine surface tension, forming a white foam, at which time patients usually have proteinuria. For this situation, it is recommended that patients promptly consult a doctor and treat the cause under the guidance of a professional doctor; 3. Urinary tract infection: after urinary tract infection, the urinary mucosa epithelium will be in a highly congested and edematous state, and the highly swollen urinary tract epithelium will easily fall off, plus the bacteria in the urine, and the metabolic waste in the urine will be mixed together, and the urine will become cloudy, plus the surface tension of the urine will become greater, and it will be easy to form White foam. In this case, the patient is advised to have a routine urine test, and if a large number of white blood cells are found in the urine, it proves to be a urinary tract infection, and it is recommended to give quinolone antibiotics for treatment.