The normal value of saa, serum amyloid A, is 0-10 mg/L. Exceeding the high limit of normal should be taken seriously, and the more pronounced the increase, the more serious the infection or tissue damage. Elevated serum amyloid A often suggests that the body has an infection. Because serum amyloid A is mainly produced in the liver, it is an immunoreactive protein. Its normal value is 0~10mg/L, when the value is elevated more than 10mg/L, it suggests the existence of infection, atherosclerosis and other disease factors, and the more pronounced the elevation of its indicators, it suggests the more serious. When the organism is infected and tissue damage occurs, saa can be rapidly increased about 1000 times in 4~6 hours, and its index will be slowly decreased after infection control. Due to the different methods and equipment used in different hospitals, there may be some differences in the test results. Elevated serum amyloid A results need to be taken seriously and treated in accordance with medical advice to avoid serious consequences.