Urine with impurities can be caused by drinking too little water, or by diseases such as urinary tract infections and bladder stones. 1. Drinking too little water: If you drink too little water recently, it will lead to the concentration of urine, which will lead to the discharge of urine containing impurities, which is a normal situation and does not need to be too nervous. 2. urinary tract infection: urinary tract infection is caused by pathogenic microorganisms in the urinary tract infectious diseases, patients will appear frequent urination, urinary urgency, urinary pain and other symptoms. After the urinary tract infection, the patient’s urine will appear in a large number of bacterial metabolites, shed epithelium, thus appearing cloudy urine seems to contain impurities. 3. Bladder stones: Bladder stones are hard crystals formed by minerals in the urine, usually formed in the bladder when stones from the kidneys or ureters enter the bladder, or when the concentration of oxalic acid and calcium in the urine increases. If the stones are small in size, or after extracorporeal shock wave lithotripsy, fine particulate impurities can be discharged, resulting in impurities in the urine. Drinking too little water or lead to impurities in the urine, but if there are uncomfortable symptoms, such as frequent urination, urgency, etc., you should consult a doctor for examination to avoid being caused by a disease.