C-reactive protein 20mg/L is a manifestation of elevated C-reactive protein, but it is not considered serious and is usually considered a mild inflammatory condition. C-reactive protein is synthesized by hepatocytes and is a non-specific marker of inflammation, referring to the protein that rises sharply in plasma when tissue is damaged or the body is infected. When an organism is subjected to acute infection or tissue damage, liver cells synthesize large amounts of C-reactive protein into the bloodstream, resulting in a sharp rise in C-reactive protein values. Normally, the normal range of C-reactive protein is 0-10mg/L. C-reactive protein of 20mg/L is already higher than the normal level, but patients do not need to worry too much about it, and it will return to the normal level when the condition improves. If the patient’s C-reactive protein rises to 20mg/L, and there is no obvious discomfort, then this is not serious, can be followed up and observed; if accompanied by fever and other physical discomfort, considering the existence of acute and chronic inflammatory diseases, such as septic infections, trauma, rheumatoid arthritis, and so on, it is recommended to consult a doctor in time, and find out the cause of the disease and treatment under the guidance of the doctor.