If the color of urine appears dark yellow, then the possible causes: First, suffering from liver or biliary tract diseases, such as viral hepatitis, biliary tract stones, tumors, etc., can lead to an increase in the level of bilirubin in the blood, so that the level of bilirubin in the urine is also increased, there will be dark yellow urine or tea-colored urine, etc., further liver function tests, liver, gallbladder, bile duct ultrasound, to further Further liver function tests, ultrasound of the liver, gallbladder and bile ducts are needed to further clarify the presence of related pathologies. Secondly, when there is urinary system infection, there can be dark yellow urine, usually accompanied by urinary frequency, urinary urgency, painful urination symptoms, it is recommended that the patient further urine routine examination or urine culture test to confirm the diagnosis. Thirdly, if you are dehydrated for a long time or drink less water, you will have concentrated urine, which is yellowish in color and is usually not accompanied by any urinary irritation or pain, etc. After drinking more water and urinating more, the color of urine can return to normal.