3 months old baby temperature 37.7 ℃ belongs to low fever, need to be treated with fever; at the same time for the cause of the treatment is very important. 3 months old baby temperature 37.7 ℃ general treatment does not use antipyretic drugs; can use warm water external compresses on the forehead of the child, reduce the wearing of clothing and other physical methods to lower the temperature, some children’s body temperature can gradually decline. Secondly, give the baby to feed the right amount of water, fever will cause the baby to appear dehydrated. General body temperature of 38.5 ℃ and above before the need to use antipyretic drugs, because high fever prone to heat convulsions. At the same time for the cause of the treatment is also very important for the recovery of temperature, such as viral infections, generally do not need special use of antiviral drugs. For bacterial infections, antibacterial drugs such as cefixime and amoxicillin should be used in accordance with the doctor’s instructions; for influenza viruses, antiviral drugs such as oseltamivir can be used. All of the above drugs should be used under the guidance of a doctor, avoid self-medication. There are many causes of fever in children, and it is recommended to seek prompt medical attention for evaluation and treatment by a specialist.