C-reactive protein is an acute time-phase reactive protein, and ultrasensitive CRP can detect its value more sensitively. If the value is less than 5 mg/L, it is generally considered not serious; if it is greater than 5 mg/L, it needs to look at the specific value, and it is not too serious between 5-10 mg/L. However, sometimes it is necessary to look at the dynamic changes. If the disease has just started, C-reactive protein is likely to be between 5-10mg/L, which is not serious at that time. However, if the disease changes and becomes severe C-reactive protein will definitely rise. When the value of C-reactive protein is greater than 10mg/L and less than 30mg/L, for young and strong people, it is likely that the corresponding inflammatory response is more obvious and the symptoms will be more obvious, such as fever, which is likely to be accompanied by a higher temperature and more obvious headache; some elderly people are weak and sickly, it is likely that the C-reactive protein is in the range of 10-30mg/L and will not have obvious symptoms. If C-reactive protein exceeds 30 mg/L and is between 100 mg/L, the systemic inflammatory reaction will be more obvious.