Fever 39.5 ℃ in most cases will not burn the brain, but the occurrence of encephalitis, meningitis, or children with a longer duration of febrile convulsions (due to high fever caused convulsions convulsions), the brain will cause damage. 1. Typical febrile convulsions: Children within 5 years of age who have convulsions within 24 hours of the onset of fever, but with a shorter duration, usually less than 10 minutes, are considered to have typical febrile convulsions, which have a good prognosis and do not cause brain damage. 2. Atypical febrile convulsions: generally younger than 6 months or older than 6 years old, the duration may be more than 15 minutes, and the convulsions are frequent and unconscious, for atypical febrile convulsions, which usually cause brain damage. 3. Encephalitis, meningitis: when the organism pathogenic bacteria infected brain and other parts of the encephalitis, meningitis, if the body temperature continues to rise, will further aggravate the lack of oxygen in the brain, can make the convulsions, epileptic seizures more frequent, further aggravation of the condition, may lead to brain damage. Therefore, when the fever is 39.5 ℃, especially children, should be more concerned about the consciousness, convulsions whether and when, in order to appear in time to seek medical treatment, to avoid brain damage.