A baby in March with a temperature of more than 37.3 degrees is in a low-grade fever. Fever needs to drink more water, pay attention to rest, supplement vitamin C, try to avoid going to crowded places to prevent cross-infection. You can open the window room, air convection can reduce the rate of mutual infection, be alert to high fever caused by dehydration and convulsions. You can take pediatric cold and flu granules orally, which can treat and relieve various symptoms caused by common cold and influenza. You can check the routine blood test and analyze the blood picture. If the fever is caused by virus, you can give antiviral drugs to treat the symptoms. If the fever is caused by bacterial infection, antibiotic drugs can be used for symptomatic treatment, such as penicillin, cephalosporin, macrolides. If the child’s temperature exceeds 38.5 degrees, you can take oral ibuprofen suspension drops, which can play a rapid role in reducing fever. If the child’s mental state is more depressed, high fever persists, it is recommended to go to the pediatrician, usually given intravenous infusion symptomatic treatment.