Yellowish-green urine may be caused by physiological or pathological reasons. Physiological causes are commonly found in taking too much vitamin B2 or eating foods rich in vitamin B2, while pathologic causes can be found in liver and gallbladder diseases, urethritis and other diseases. 1. Physiological causes: If you take too much vitamin B2 or foods rich in vitamin B2, such as eating carrots, the urine will appear yellowish green. This is a physiological phenomenon, no special treatment, after a period of time will recover. 2. Pathological causes: yellowish-green urine may occur when there are liver and gallbladder diseases or urethritis. (1) Hepatobiliary diseases: when the liver is damaged, the absorption of bilirubin in the hepatic and intestinal circulatory process of the liver is blocked, resulting in bilirubin being excreted from the urine, making the urine turn yellowish green. (2) Urethritis: Urethritis caused by Pseudomonas aeruginosa, the urethral secretion increases, the death of Pseudomonas aeruginosa is also discharged from the urethra, the appearance of yellow-green urine. In summary, if yellow-green urine is recommended to seek timely medical attention in order to clarify its specific causes, and give targeted treatment.