The most likely causes of white flocculent after urine precipitation: 1, infection of the urinary tract, after infection, the increase of bacterial metabolites in the urine can be manifested as cloudy urine, often combined with pus urine, while the infection can cause increased urinary epithelial shedding, the urine can appear white flocculent or feathery precipitate, can be accompanied by frequent urination, urinary urgency, painful urination or fever and other symptoms, need to be further retained urine for urine culture or urine routine laboratory tests to confirm the diagnosis. 2.It can also be seen in the presence of tumors in the urinary tract, which can cause increased urinary tract epithelial shedding or combined bleeding, infection, etc., can appear flocculent white precipitates in the urine, or even blood clot changes, usually not accompanied by urinary tract irritation or urinary tract pain, etc., need to conduct urinary tract ultrasound or CT examination to confirm the diagnosis. 3. If there is salt urine can also cause white flocculent in urine. After precipitation, white crystals are found at the bottom, which are more common in cold weather, and are commonly seen when the amount of water consumed is relatively low, and the concentration of formed components in the urine is relatively high, then white crystalline precipitates will appear when cold air is encountered during urination or when the body temperature drops.