The baby’s body temperature of 38.4℃ is not considered high fever, it should belong to moderate fever, that is, moderate fever. 39 degrees or above is high fever, which is more common clinically as respiratory system infection and inflammatory reaction in the body, such as upper respiratory tract infection and bronchitis. If the baby’s symptoms are not serious enough, such as mental state, diet is still okay, you can drink more warm boiled water, warm juice, appropriate rest, no need for special treatment, can slowly reduce the body temperature. If the baby appears to sweat too much, which may lead to dehydration, the body fluids should be replenished in time, such as giving oral rehydration salts to the baby, and if necessary, intravenous drip rehydration. Anti-pathogen treatment, for viral infections give ichthyosanthin granules, blue scutellaria oral liquid, Qingkailing granules, etc. as appropriate. Anti-bacterial treatment can be given with penicillin and amoxicillin to gradually reduce the fever in order to cure and relieve the baby’s condition.