Under normal circumstances, a person’s urine routine is negative for bilirubin. If the urine routine test result shows bilirubin 2+, it indicates that the bilirubin is elevated relative to the normal level, and it is usually considered that there are two causes of elevated bilirubin: a. Physiological elevation: If a newborn develops physiological jaundice, there is usually no other discomfort, and it can subside on its own after about a week. Too little water, long-term alcohol consumption, and strenuous exercise may also cause elevated bilirubin, but it can generally recover on its own. Pathological elevation: 1, biliary obstruction: biliary obstruction is the most common cause of bilirubin elevation, biliary obstruction can cause bile stasis in the liver, resulting in impaired bile excretion, which in turn causes elevated bilirubin in the urine; 2, other diseases: obstructive jaundice such as bile duct stones, biliary tumors, etc.; hepatocellular jaundice such as acute jaundiced hepatitis, cirrhosis, etc.; hematologic jaundice such as hemolytic anemia, malignant blood diseases, etc. Malignant blood diseases, etc., can also cause the bilirubin in the urine to rise.