ALP stands for alkaline phosphatase. Alkaline phosphatase is mainly distributed in the liver, and it is distributed on the blood sinusoidal side of hepatocytes and on the microvilli on the capillary bile duct side, and it is discharged into the small intestine via bile. When bile is not discharged smoothly and the pressure in the capillary bile duct increases, a large amount of alkaline phosphatase is produced, and high alkaline phosphatase is often seen in chronic hepatitis, cirrhosis or alcoholic hepatitis. In addition, ALP can also come from the bone, intestine, kidney, placenta and other parts of the body, so when there is an increase in ALP, it is important to analyze the specific problem and determine the cause of ALP elevation.