Yellow and cloudy urine may be caused by physiological reasons such as drinking too little water, but also may be caused by acute cystitis, hepatitis and other pathological reasons. 1. Physiological reasons: such as drinking too little water, sweating more or holding urine for a long time, which can lead to the concentration of urine, resulting in yellow cloudy urine. 2. Acute cystitis: acute inflammation of the bladder caused by non-specific bacterial infection. The main manifestations are urinary frequency, urinary urgency, urinary pain, hematuria, fever and other symptoms. Its bacterial metabolites or bladder mucosal detachment, can also cause yellow cloudy urine. 3. Hepatitis: it can lead to elevated direct bilirubin in the body, and direct bilirubin is water-soluble, can be discharged through the urine, resulting in elevated bilirubin in the urine, which can cause yellow cloudy urine. Yellow cloudy urine may also be caused by other factors, should be taken seriously, timely consultation, identify the cause of the disease, and follow the doctor’s instructions for further treatment or treatment.