Reactive protein measurement is generally referred to as C-reactive protein measurement, which is an indicator of inflammation, mainly reflecting the presence of inflammation or infection in the body. 1.C-reactive protein is an acute phase reactive protein, synthesized in the liver, with a normal reference value of 0~10mg/L. The normal reference range varies in different hospitals due to different testing instruments, and is based on the local tertiary hospital. The elevation of this index suggests inflammation, tissue damage, active disease and other reasons. 2. Elevated C-reactive protein usually suggests the presence of inflammatory reaction, if there is infectious inflammation such as bacterial infection, C-reactive protein will be elevated, and non-infectious inflammation, such as rheumatoid arthritis, ankylosing spondylitis, C-reactive protein will also be elevated. In addition, C-reactive protein is also elevated in cases of tissue damage such as acute myocardial infarction. 3. If the phenomenon of elevated C-reactive protein occurs, it is necessary to improve other related tests under the guidance of the doctor to clarify the cause of the disease and do the corresponding treatment, and cannot rely on a single indicator to determine the existence of which disease.