High fever in infants is usually caused by infections, and there are many causes of infections, such as viruses, bacteria or mycoplasma that can lead to infections. These infections produce large amounts of toxins in the body, and these toxins act as a pyrogen, stimulating the thermoregulatory center and causing the thermoregulatory point to shift upward, so a high fever can occur, and the more severe the infection, the higher the fever temperature. At this time, it is often necessary to choose the appropriate anti-inflammatory drugs for treatment according to the type of infection, such as bacterial infections, intravenous drip antibiotics; viral infections can be intravenous drip ribavirin; if the infection is mycoplasma or chlamydia, you can use azithromycin for treatment. In addition, high fever is more dangerous, it is easy to lead to the occurrence of febrile convulsions, irreversible damage to the child’s brain cells, to quickly carry out antipyretic treatment, it is recommended to give the infant oral ibuprofen suspension for antipyretic treatment.