Raising a baby can be especially taxing for some young moms and dads. Fever is a common clinical symptom in children and one of the main reasons parents bring their children to the clinic. However, what temperature suggests that the baby has a fever, we need to pay attention to these aspects below. 1, the method of measuring body temperature should be correct, because the development of the thermoregulatory center of the 4-month-old baby is still not very complete, body temperature is easily affected by the external environment temperature, so we measure the temperature in the correct way to ensure that the measured value is accurate, it is generally recommended to measure the temperature of the baby in a relatively quiet state, because the baby crying or movement will cause the temperature to be high; the location of the measurement of body temperature to choose Underarm temperature, which is the more commonly used position, oral temperature and rectal temperature will generally be higher, measurement is not convenient, generally do not recommend the choice; do not wear or cover the baby too much, do not hold the baby temperature measurement, these can cause the baby’s body temperature is high; underarm sweat need to dry, to avoid affecting the measurement value. Only if the measurement method is correct, the temperature obtained will be reliable. If the temperature exceeds 37.3 degrees Celsius, it indicates that the baby has a fever and needs to pay attention to it and actively look for the cause of the fever.