Some small children have frequent fevers for a variety of reasons, and finding the exact cause requires close and more observation by parents and careful communication with the doctor. A relatively common cause of fever in children is frequent upper respiratory tract infections. Some children always have upper respiratory infections especially during the change of seasons. It can be seen that parents bring their children to the clinic wearing short sleeves while the child wears two layers of long-sleeved T-shirts and a jacket on the grounds that the child is afraid of the cold, while the child is actually sweating all over his or her chest and back. Therefore, it is very important to increase and decrease clothing with the seasons to reduce the chills and colds of children. There are also reasons why children have allergies, often allergic rhinitis nasal blockage and runny nose, etc., and every once in a while they will have a combination of infection, yellow nose, fever, etc.. Then you should not treat every runny nose as a cold, but avoid allergens, anti-allergy treatment, prevent secondary infections, etc. In short, there must be a reason for your child to have frequent fever repeatedly, and it is important to observe carefully and record the pattern of temperature changes and possible triggers of fever. It is important to find the foci of infection for each fever, analyze the causes of infection in these areas, provide targeted treatment, and prevent and control the fever from lifestyle and lifestyle habits in order to break the chain of fever and completely avoid recurrent and frequent fevers.