Isthmus fever 40 ℃ if children, fever longer, may “burn the brain”; if adults, generally tolerate, will not cause damage to the brain. If the children due to isthmus fever 40 ℃, especially for infants and young children, if the fever lasts longer, it is likely to cause febrile convulsions, causing some damage to the brain, and in severe cases even cause epilepsy, convulsions and other symptoms. Adults are more tolerant to high fever, fever of 40 ℃ generally will not “burn out the brain”, generally do not have very serious consequences, but also should be actively for antipyretic treatment. Therefore, the fever of 40 ℃ caused by pharyngitis, not only need to actively reduce fever treatment, but also to actively carry out the treatment of pharyngitis.