A child with a high fever of 39.5 degrees overnight is something that needs to be dealt with quickly, otherwise it is very dangerous. Especially for infants and children under three years old, their brains are not fully developed yet, so they are easily affected by high fever and have febrile convulsions, which can cause irreversible damage to their brain cells and brain functions, so they need to take antelope horn granules to prevent febrile convulsions. Antelope horn granule is a kind of Chinese medicine, the side effects are relatively small. You also need to take fever-reducing drugs to reduce fever, you can take oral ibuprofen suspension or acetaminophen pellets, after an interval of 4-6 hours is possible to repeat the child’s medication once, not more than four times a day. If your child has a high fever, you must give him/her more water and combine it with physical cooling methods. You can put fever patches on the child’s forehead, as well as on the neck, back, palms and feet.