Whether C-reactive protein 40 is dangerous needs to be analyzed in conjunction with the history and other findings. 1. Typically, CRP ranges from 10-50 mg/L in mild inflammation, 50-100 mg/L indicates more severe disease, and more than 100 suggests bacterial infection and severe disease. 2. The higher the CRP, the more likely it is to be bacterial infection, the index usually climbs around 6-8h after bacterial infection, with the peak value appearing in 24-48h. Because CRP is not obvious in viral infection, it is often used to help distinguish between bacterial and viral infections. 3. In the course of antibiotic treatment, it is recommended to review CRP routinely, which can reflect the effectiveness of antibiotics, if CRP shows a significant downward trend, it proves that the pathogenic bacteria are sensitive to antibiotics. Clinically, the judgment of the condition can not be based on an isolated indicator alone, but should be combined with the actual situation to make a comprehensive judgment.