Ultrasensitive C-reactive protein 25mg/L is not normal, which is one of the markers used to reflect the presence of infection or inflammatory damage in the body. The normal value of ultra-sensitive C-reactive protein is not more than 10mg/L. Excessive values may be due to inflammatory infections, fever, etc. 1. Inflammatory infections: Generally, when the child applies specific drugs or when there is an infection in the body, it can lead to high levels of ultrasensitive C-reactive protein. The specific reason is that the specific groups of drugs and some pathogens stimulate the child’s immune system to produce a stress response, so the lymphatic production of a certain amount of ultra-sensitive reactive protein to replenish the immune process of immune cell death. 2. Fever:Fever in infants and young children will make the ultrasensitive C-reactive protein up to about 25mg / L. After taking the drug and still recurring fever, it is strongly recommended to go directly to the hospital to consult the Department of Pediatrics, to clarify the possible pathogens and diagnosis of infections, and at the same time, active treatment. In addition to acute infections, elevated C-reactive protein is also seen in chronic inflammatory diseases, such as tuberculosis, rheumatism or connective tissue disease, and is used to determine whether the condition is in an active stage. If such a condition occurs in the clinic, it is important to seek prompt medical attention for the next step in treatment.