When infectious or non-infectious factors lead to dysfunction of the thermoregulatory center, and the body temperature exceeds the normal range, it is called fever. 1, infectious factors: the most common infectious factors that cause recurrent fever in infants and children are bacterial, viral and mycoplasma infections. Repeated fever more than 24 hours to check the blood routine and mycoplasma antibody test, bacterial infections to give the appropriate antibiotics, such as cephalosporins or penicillin; viral infections can be given to the Chinese medicine of the four seasons antiviral combination, influenza virus infection is preferred Oseltamivir phosphate treatment; Azithromycin is the drug of choice for mycoplasma infections. 2, non-infectious factors: accumulation of food, teething, vaccination may lead to recurrent fever in children. A clear diagnosis should be made and the appropriate treatment should be given, and timely oral solution can be given to eliminate accumulation; teething care temperature can be more than 38.5 ℃ timely give ibuprofen or acetaminophen drugs to reduce fever, less than 38.5 ℃ to give physical cooling, wipe the armpits, forehead, groin with a warm towel; vaccine reaction to maintain the fever for 2 to 3 days, during which usually not accompanied by other symptoms. The fever has triggering factors, and only when the triggering factors are removed can the normal body temperature be restored.