Normal urine foam usually disappears in 2-3 minutes. Normal people do not have foam in the process of urination, if the urine flow is more urgent, there will be foam inside the urine, this situation is more common in the clinic, especially in the cold season more, most of the foam will disappear completely within 2-3 minutes. If it does not disappear and the foam persists, it is possible that the patient has kidney disease, excretes urine protein or has diabetes. This situation needs to be taken seriously, observe whether the patient has frequent and urgent urination, visit the hospital in a timely manner, test urinary routine and kidney function, and if necessary, test the 24-hour urine protein quantification. If there is kidney disease, early treatment is needed, and if the blood sugar is high, it needs to be lowered to the normal range. In addition, patients are not recommended to hold urine for a long time, pay attention to balanced nutrition in daily life, and avoid spicy and stimulating food.