After the new crown after the vaccine appeared high fever, you can choose physical cooling, you can also choose drugs to reduce fever, if necessary, as soon as possible to the hospital. Fever after the baby after the new crown vaccine is a relatively common phenomenon, mainly due to the adverse reaction of the vaccine so caused, generally preferred physical cooling-based, such as warm water wipe forehead, armpits, soles of the feet, etc. or the use of antipyretic dressing, ice packs to cool down, alcohol antipyretic. If the temperature exceeds 38.5 degrees. Symptomatic use of antipyretic drugs should be used, such as ibuprofen, acetaminophen, compound aminophen xuanamin granules, pediatric chai gui granules and so on. At the same time, we should urge the baby to drink more warm water, pay more attention to rest, more nutrition, general vaccine-induced fever in about three days can be relieved on their own, if there is still a high fever, the improvement is not obvious should go to the hospital fever clinic. Medications should be administered under the guidance of a doctor.