It is relatively normal for a child to have fever symptoms after a shot. Fever due to symptoms of upper respiratory tract infection caused by bacterial and viral invasion is cyclical and does not usually appear to subside immediately without the use of glucocorticoids. At this time, do not overstress, you can give your child more water, pay attention to rest, and take vitamin C supplements to prevent cross-infection. If the body temperature exceeds 38.5℃, you can take oral ibuprofen suspension, which can play a fast role in reducing fever. If the fever is persistent, the medication can be repeated once in 4-6 hours, no more than 4 times a day. If the body temperature does not exceed 38.5℃, pediatric aminophenol xanthamine granules can be taken orally to treat and relieve the symptoms of fever caused by common cold and influenza. You can also take oral Chinese medicines, such as Blue Scutellaria Oral Liquid, Shuanghuanglian Oral Liquid, Antelope Horns Granules, etc. to clear the heat and detoxify the toxins.