Ibuprofen is a fever-reducing medicine. The dosage for a one-year-old child is calculated according to the child’s weight, not according to age, because the dosage may be too much or not enough if given according to age. Some one-year-old children are fat and may weigh up to 12 kg, while some children are thin and may even weigh only 9 kg, so it is safer to calculate the dosage of medicine for children according to their weight and instructions. Ibuprofen is mainly used for oral administration when the fever is above 38.5℃. If the body temperature is around 38℃, do not rush to take antipyretic drugs, you can take physical cooling, such as taking a warm bath or wiping the child’s head and neck, armpits and groin with warm water to facilitate heat dissipation, and it is better to take antipyretic drugs as little as possible.