Under normal circumstances, the foam in the urine can disappear relatively quickly, usually no more than 2 minutes. And if the foam does not dissipate for 5 or even 10 minutes, the possibility of proteinuria is considered, and it is recommended to go to the hospital in time to improve the routine urine examination. When the protein content in the urine increases, more foam can be produced in the urine and last for a longer time. If the patient has physiological proteinuria, which is mainly related to daily strenuous activities or factors such as fever or cold, the foam in the urine is smaller and more fragmented and lasts for a shorter period of time, usually disappearing within 2 minutes. If the patient has pathological proteinuria with larger foam and it can last for more than 5 minutes, it is recommended to promptly visit the nephrology department of the hospital for urinalysis to clarify the diagnosis. Only when protein is found in urinalysis, proteinuria can be diagnosed. In daily life, patients need to pay attention to rest, have a low protein diet and avoid spicy and stimulating foods. Also, it is recommended to drink more water to promote urination, and vitamin supplements may be appropriate.