Green urine may be caused by: First, if a large number of anti-inflammatory drugs or taking vitamin B, etc., can cause the greenish color of urine or appear yellowish green, mostly directly related to taking drugs, after stopping the intake of related drugs, the greenish urine can be improved. Usually there is no urinary tract irritation and there is no back pain or fever. Secondly, if there is Pseudomonas aeruginosa infection, there can be green urine, and the infection can be accompanied by frequent urination, urgent urination, painful urination or with cloudy urine, lumbago, fever, etc. Urine culture test is needed to further confirm the diagnosis. Thirdly, if the bilirubin content in the urine is increased and the bilirubin is oxidized and reduced to bilirubin in the state of not urinating for a long time, the greenish urine color can appear, or the greenish urine color can appear after the urine is discharged for a period of time. It is recommended that a urine bilirubin test and a serum bilirubin level test be performed for further clarification.