A child’s fever is not a boost to immunity, but mainly a symptom of upper respiratory tract infection caused by low immunity, resulting in bacterial and viral invasion. You can drink more water, pay attention to rest and take vitamin C supplements to prevent cross-infection. You can take pediatric aminophenol flavonamide pellets orally, which can treat and relieve various symptoms caused by common cold and influenza. If the fever is caused by epidemic virus, you can take Oseltamivir phosphate granules orally, which can prevent and control the attack of influenza virus. When a child has a fever, the blood can be checked and analyzed by blood analysis. If the fever is viral in nature, it can be treated symptomatically with antiviral drugs. If the fever is caused by bacterial infection, you can use antibiotic drugs for symptomatic treatment. You can also take oral Chinese medicine, such as Pu Di Lan Anti-inflammatory Oral Liquid, Blue Scutellaria Oral Liquid, Lian Hua Qing Fei Granules, Compound Da Qing Ye Compound and other antiviral drugs to clear the heat.