Long-term yellowing of urine is considered to be caused by the following reasons: 1. Consider patients who drink less water in daily life, and their urine is concentrated, resulting in yellow color, usually without any urinary tract irritation symptoms; 2. Consider patients with liver disease, such patients may have abnormal bilirubin metabolism, and there is always high bilirubin in the urine, so there will be yellow color; 3. Patients who have been taking drugs for a long time, such as sulfonamide antibiotics or vitamin B complex and vitamin preparations, can lead to the phenomenon of yellow urine color. The above is an analysis of the basic causes of long-term yellowing of urine, and it is recommended that if the patient’s urine is not yellow for a long time due to physiological phenomena, he or she should go to a regular hospital for relevant examinations to clarify the diagnosis, and the doctor will treat the symptoms according to the examination results.