Possible causes of green urine: First, if a large amount of antibiotics are taken orally, the phenomenon of green urine can occur for a short period of time. In this case, the urine can return to its normal color after the intake of the relevant medication needs to be stopped. Second, if there is an infection caused by Pseudomonas aeruginosa, green urine can appear, and this condition is mostly accompanied by frequent and urgent urination, accompanied by pain in the small abdomen and lower back. Urine culture is needed to culture Pseudomonas aeruginosa, then the specific cause of the disease can be confirmed. Thirdly, if the urine contains a large amount of bilirubin, the discharged urine can form bilirubin after it has been placed, and then it can appear light green urine, which is usually not accompanied by frequent and urgent urination. However, when a routine urine examination is performed, the level of urinary bilirubin can be seen to increase, and the patient may have a yellowish stain on the skin and sclera of the whole body, and the jaundice index may increase when the liver function is checked.