The white flocculent after urine precipitation is an abnormal phenomenon, and it is recommended to go to the hospital for further examination to clarify the cause.1. There may be urinary tract infection, and after the infection the mucous membrane epithelium of the urinary tract is shed more. The number of leukocytes and pus cells in the urine increases significantly, forming white flocculent or feathery sediment, usually accompanied by cloudy urine or frequent urination, urinary urgency, painful urination and other discomforts, it is recommended to carry out urine routine and urine culture examination to further confirm the presence of infection; 2. Patients with urinary tract stones may have white flocculent sediment after treatment such as extracorporeal shock wave lithotripsy or drug lithotripsy. Patients with urinary tract stones may have white flocculent or crystalline deposits after treatment with extracorporeal shock wave lithotripsy or medication for stone removal, mostly formed by small stones or exfoliated epithelium.