Babies aged 3 years and 8 months with persistent fever can take warm baths or use fever-reducing patches to lower the temperature physically, but it should be noted that temperatures over 38.5℃ require antipyretic medication (e.g., ibuprofen, etc.) to reduce fever. Fever is a common symptom of pediatric diseases and can produce muscle pain and other discomforts. If the 3-year-old 8-month-old baby persistent fever, body temperature does not exceed 38.5 ℃, you can use the head of the antipyretic patch or warm water baths, etc., as appropriate, to reduce the wearing of clothing, to increase the dissipation of heat, which can play a role in physical cooling, do not recommend the use of alcohol wipes, ice enemas to cool down the temperature method. At the same time need to pay attention to for the body temperature rises significantly, more than 38.5 ℃ baby, may appear physical cooling effect is not good, need to use ibuprofen or acetaminophen and other antipyretic drugs under the guidance of the physician to reasonably reduce fever, at the same time, need to actively consult the doctor, to clarify the cause of fever and treatment. If your 3-year-old 8-month-old baby has a persistent fever, we recommend that you seek medical attention and have your baby evaluated by a specialist for reasonable intervention.