Possible reasons for yellow urine color: First, food or drug staining, such as oral carrots or oral rifampin capsules, aminopyrine tablets, etc. may cause yellow urine color change, but generally not accompanied by any urinary stimulation symptoms, will not produce pain, urinary frequency, urinary urgency, etc., after stopping the relevant drugs or food intake urine color can return to normal; Second, urine is extremely concentrated state, such as drinking less water or accompanied by diarrhea, vomiting, resulting in excessive loss of body fluids will appear urine yellow, or long time without urination. If you drink less water or have diarrhea or vomiting that causes excessive loss of body fluids, you will have concentrated urine, or if you have not urinated for a long time, the urine of patients with urinary retention is very yellow, and it is usually not accompanied by any urinary irritation; third, if there is urinary tract infection, you can have yellow urine, and it is accompanied by urinary frequency, urinary urgency and other urinary tract irritation symptoms, and it can also be accompanied by cloudy urine, so you need to confirm the diagnosis by routine urine examination; Fourth, if there is hepatocellular jaundice, liver damage, biliary obstruction and other diseases that lead to an increase in the level of bilirubin in the body, then the bilirubin excreted from the urine will also increase and there will be very yellow urine.