A normal person will have a small amount of urobilinogen in their urine, which is usually negative. The normal values for a quantitative urinary bilirubinogen test are 0.3-3.55 μmol/L for adult males and 0-2.64 μmol/L for adult females. the reference value for a quantitative urinary bilirubin test is negative or weakly positive. Therefore, urobilinogen 3.3 μmol/L is basically within the normal range of values in the quantitative urinary bilirubinogen test. In addition, due to impaired bilirubin metabolism caused by various diseases inside and outside the liver and biliary tract, unconjugated bilirubin and conjugated bilirubin are retained in the blood, so urine bilirubin 3.3μmol/L is not necessarily normal at this time. At this point, clinical symptoms and signs as well as liver function and imaging are also needed to further rule out the presence of obstructive jaundice, such as bile duct stones, bile duct cancer, cancer of the head of the pancreas, and peri-potbelly cancer. An elevated bilirubin in the blood and a urinary bilirubinogen of 3.3 μmol/L would indicate abnormal liver function. If liver function and bilirubin in the blood are normal, urinary bilirubinogen 3.3μmol/L can be considered a normal urinary routine result. There is also bilirubin in the blood circulation, part of which will be absorbed by the intestinal wall back to the liver, and then from the liver into the kidneys or blood, and excreted with the urine, so there will be a small amount of urinary bilirubin in the urine, which is a normal physiological phenomenon, and usually no need to worry.