Calcitoninogen test data of 0.12ug/L is not serious. Bacterial infection is usually considered clinically when calcitoninogen is ≥0.5ug/L. Therefore, when calcitoninogen is 0.12ug/L, the presence of bacterial infection is usually not considered, so this indicator does not indicate the severity of the disease. Calcitoninogen test has become an important reference index for the diagnosis and treatment of bacterial infectious diseases. A large number of studies have shown that this index has a clear correlation with the severity and prognosis of systemic infections such as inflammatory response syndrome, sepsis and septic shock caused by infection. Clinical judgment of infection should be combined with the relevant indicators and the patient’s condition, so it is recommended that patients who feel unwell or have elevated calcitoninogen and suspect infection should consult a doctor in time, so as not to delay the condition.