The common types of jaundice are obstructive jaundice, hepatocellular jaundice, and hemolytic jaundice. Obstructive jaundice is caused by mechanical obstruction of the small intrahepatic capillary bile ducts, hepatobiliary ducts, or common bile ducts, resulting in golden yellow skin, yellow-green color, yellow urine, and white clay-like color of stool. Laboratory tests: elevated total bilirubin, positive urine bilirubin test, decreased or absent urobilinogen and fecal bilirubin, increased serum alkaline phosphatase and total cholesterol. Common diseases: bile duct cancer, pancreatic head cancer, jugular abdomen tumor, bile duct stones 2, hepatocellular jaundice caused by the destruction of liver cells, commonly caused by viral hepatitis, acute xanthogranulomatous viral hepatitis jaundice for a few days to a week. The most prominent symptoms are fatigue, lack of appetite. Nausea, pain or discomfort in the liver area, with or without fever. The main signs are jaundice, hepatomegaly or hepatosplenomegaly with slight roentgenographic tenderness and often percussion pain in the liver area, or there may be no obvious hepatomegaly. Pre-jaundice clinical diagnosis is difficult, but at this time, serum aminotransferase (AST, ALT) activity is often significantly elevated, direct bilirubin, indirect bilirubin are elevated, increased urinary urobilinogen excretion with positive bilirubin, which helps to diagnose. Common diseases Viral hepatitis, various infections, drugs and toxic liver damage Third, hemolytic jaundice The degree of jaundice is mild, often with skin and sclera yellow staining is often light lemon yellow, and often accompanied by pale skin due to anemia. In acute hemolysis, there may be fever, chills, headache, vomiting, lumbago, and varying degrees of anemia and hemoglobinuria (soy sauce or tea-colored urine), and in severe cases, there may be acute renal failure. Chronic hemolysis is mostly congenital and is accompanied by splenomegaly in addition to anemia. The diagnosis of hemolytic jaundice relies on the following laboratory tests: increased fecal bilirubin and urinary bilirubin; significant increase in blood and indirect bilirubin, insignificant increase in direct bilirubin, increased reticulocytes in the blood; increased serum iron content; exuberant proliferation of the bone marrow red system on bone marrow smear.