If the urine is light green, the possible causes are as follows: 1. When the body is taking a lot of antibacterial agents or a lot of vitamins, this can cause a light green urine, which is not accompanied by any discomfort in urination. After stopping the relevant drugs and drinking more water, the urine can return to normal and will not bring any damage to the organism. 2. When jaundice and disease exist, it can cause the bilirubin level in the urine to increase. After urination, the urine is left for a period of time and the bilirubin is reduced to a light green color and then a light green color of urine can occur. A routine urine examination is needed to find out if there is a high bilirubin level, which is usually not accompanied by any urinary irritation symptoms; 3. When Pseudomonas aeruginosa infection occurs, it can cause light green urine, which is usually accompanied by cloudy urine, urinary frequency, urinary urgency, painful urination, and even an increase in body temperature, etc. A urine culture examination is needed to further confirm the diagnosis.