Fever in 50-day-old babies should be treated symptomatically (e.g., physical cooling) and the cause of the fever (e.g., respiratory tract infection) should be clarified. Fever is a common symptom in pediatrics. For 50-day-old babies with elevated temperatures, symptomatic antipyretic should be carried out under the guidance of a physician, e.g., antipyretic patches or warm water wipes on the forehead can be used to lower the temperature physically. Usually, if the body temperature exceeds 38.5℃, antipyretic drugs (such as ibuprofen drops, etc.) should be used, but there is no safe antipyretic drug for this age group of babies, and antipyretic drugs should be used under the guidance of a doctor to avoid the occurrence of hypothermia. At the same time, to clarify the cause of fever and treatment is the focus of treatment, as the condition improves, the body temperature can gradually normalize. In acute upper respiratory tract infection, fever, nasal congestion or cough and other symptoms, the presence of bacterial infection using cefaclor and other anti-infective treatment. Fever in 50-day-old babies can also be seen after crying, activity, belong to the physiological temperature rise, such babies do not need special intervention. All of the above drugs should be used under the guidance of a physician, and it is recommended to consult a specialist to determine the cause of the illness and treatment.