A 3-month-old child’s temperature of 37℃ is normal and not fever, no matter which part of the body is measured or which measurement method is used. If the child’s axillary surface temperature is >37.4°C, anal temperature is >37.7°C, ear temperature is >37.7°C, and forehead temperature is >37.2°C, then the child has a fever. Fever usually means infection and the child needs to be taken to the hospital to be seen and checked for the cause. Of course, in the case of low fever, physical cooling methods can be used, such as applying cooling patches and warm water baths to assist in reducing the fever. If there is a high fever, you should take fever-reducing drugs in time, commonly used ibuprofen drops. Children’s body temperature normal daily fluctuations of about 1 ℃, usually the early morning temperature is relatively low, the afternoon temperature is relatively high, as long as it is within the normal range of temperature and there is no clinical discomfort symptoms, no need to be nervous, do not need special treatment.