Normal urine is clear and transparent without any impurities, showing a light yellow or amber color, and can be colorless when drinking more water, and there will be no flocculent sediment during urination, nor cloudy urine, and no symptoms of urinary urgency or painful urination. The volume of urination at one time is about 150-250ml, which is related to the length of time of holding urine, and there is no abnormal smell after urination out, and there is no purulent discharge in the urethra. Only in disease conditions can the urine appear cloudy or change in color or precipitate, such as more flocculent material in the case of urinary tract infections. When urinary tract stones are treated with lithotripsy, the urine can appear as fine particle-like sediment or cloudy urine, and when a man has prostatitis, it can also be accompanied by cloudy urine, mostly cloudy at the beginning and clear at the end.