Three months baby fever 37.9 ℃ may be overdressed and other physiological factors, this time without special treatment; may also be due to infection, leukemia and other pathological factors, can be through physical methods to lower the temperature, at the same time need to be for the cause of the treatment. 1. overdressed and other factors: breastfeeding, after meals, exercise, crying, too thick clothing, high room temperature and emotional fluctuations, etc. can make the three-month-old baby’s body temperature is slightly up to 37.5 ℃ or so, so that when the baby is not coughing, sniffling and other discomforts, you can reduce the foreign body, crying, etc., and dynamically monitor the baby’s body temperature changes. 2. Infection: for viral infections, generally no special use of antiviral drugs; if combined with bacterial infections, should follow the use of cefixime, amoxicillin and other antimicrobial drugs; if caused by the influenza virus, the application of oseltamivir and other medications; for Mycoplasma pneumoniae infections can be used in azithromycin and other drug therapy. 3. Leukemia: will also make the baby fever to 37.9 ℃ phenomenon, need to pay attention to the protective environment isolation to reduce infection, components of blood transfusion to supplement red blood cells, platelets, etc.; follow the doctor’s instructions to use vincristine, Zoerythromycin, Mentholatum enzyme, Prednisone and other drugs for chemotherapy. For children with recurrent fever, physical methods such as applying warm water to the child’s forehead and reducing the amount of clothing worn can be used to lower the temperature, and children are encouraged to drink more water, so that the body temperature of some children can gradually decrease. All of the above drugs should be used under the guidance of a doctor, avoid self-medication. There are many other causes of fever in three-month-old babies, and it is recommended that parents send their babies to the hospital in time for a relevant examination to clarify the cause of the disease and then do targeted treatment.