C-reactive protein 40 in children generally burns for a few days and is mainly related to the specific symptoms of the patient as well as the treatment and cannot be generalized. C-reactive protein is an indicator of inflammation, but it is not specific and may be associated with acute and chronic inflammation and autoimmune reactions in the body. If a child has C-reactive protein 40 without any other abnormalities, a bacterial or viral infection is considered to be the cause of the fever. However, if a child has a C-reactive protein 40, a significantly higher white blood cell, a significantly higher neutrophil ratio, a chest X-ray or CT showing a large area of infection, and electrolyte disorders, the situation is more serious and the fever can last for more than 10 days, so it is recommended to go to the pediatric internal medicine department of a regular hospital for timely treatment. During the fever, if the child’s body temperature exceeds 38.5℃, apply antipyretic drugs, and the body temperature below 38.5℃ is mainly physical cooling, which can be applied to cooling paste or warm water wipe.