5 months baby fever 38.5 ℃ no fastest way to reduce fever, may be caused by viral or bacterial infection, the need for symptomatic treatment as well as the cause of the treatment, such as timely cooling, if necessary, to comply with the doctor’s orders to use antibiotics, such as amoxicillin as well as cefdinir and so on. 1. Symptomatic treatment: the baby fever reached 38.5 ℃ need to be timely cooling treatment, so as not to lead to febrile convulsions (due to high fever caused by convulsions convulsions), such as more to the baby to drink lukewarm water, reduce the clothing, keep the indoor air circulation, but also to the baby to use the lukewarm water to bathe the body. You also need to use antipyretic medication, such as acetaminophen, under the guidance of a doctor. 2. Treatment of the cause: need to actively take the baby to the regular hospital, clear what causes the fever, in targeted treatment, if it is a viral infection, due to the virus has a self-limiting, the course of the disease usually does not exceed one week, usually do not need special treatment, only need symptomatic treatment. If the fever is caused by bacterial infection, antibacterial treatment is needed, such as amoxicillin and cefdinir and other antibiotics can be used under the guidance of the doctor to treat. If the baby recurrent fever, need to go to the regular hospital for further examination, clear specific causes, and then targeted treatment.