Alkaline phosphatase content, helps to determine the index of osteoblast activity enzyme, in the high degree of osteoblast activity, alkaline phosphatase is likely to be increased in content, for example, normal developmental period of the adolescent measurement of alkaline phosphatase is likely to be on the high side, because he is in the period of growth and development, and the value of alkaline phosphatase during the period of growth and development, is likely to be higher than the normal 1-2 times, which are normal, because It is normal because it is growing vigorously and osteoblast activity is very high. In addition, there are some special diseases that can cause elevated alkaline phosphatase during adult physical examination, first of all, metabolic diseases of the bones, such as some rickets or bone metabolism problems, will cause elevated alkaline phosphatase. Secondly, liver diseases, such as liver cancer and cirrhosis, can also cause elevated alkaline phosphatase. Finally systemic metabolic diseases, like some specific reactive arthritis, can also cause elevated alkaline phosphatase.