The appearance of green urine, may be due to biliary tract stones, urinary tract infection, cystitis, medication factors, etc., need to go to the hospital for further examination to clarify the cause of the disease, under the guidance of the doctor for treatment. 1. Bile duct stones: generally due to bile duct stones lead to bile duct stenosis, affecting the discharge of bile, so that the bilirubin is elevated, which in turn causes the phenomenon of green urine, bile duct stones may also appear epigastric pain, distension, nausea and other symptoms. 2. Urinary tract infection: usually due to pathogen infection, change the organic composition of urine, may also be due to urinary tract infection by Pseudomonas aeruginosa, which in turn causes the phenomenon of green urine, urinary tract infection will generally appear frequent urination, urinary urgency and other symptoms. 3. cystitis: may be due to the bladder by Pseudomonas aeruginosa infection, which in turn causes the phenomenon of green urine, cystitis usually appear urgent, painful urination and other symptoms. 4. drug factors: consider a large number of oral antibiotics or oral vitamin B and other drugs related to the general metabolism of the product of the drug and cause the phenomenon of green urine. If the urine is green, it is recommended that the patient go to the hospital in time, after the cause of the disease is clear, under the guidance of the doctor.