You have to consult nearest pediatrician for specific treatment immediately... And fallow bellow advices at home
Drink plenty of fluids. Fever can cause fluid loss and dehydration, so drink water, juices or broth.use an oral rehydration solution. These solutions contain water and salts proportioned to replenish fluids and
electrolytes.
Rest. You need rest to recover, and activity can raise your body temperature.
Stay cool. Dress in light clothing, keep the room temperature cool and sleep with only a sheet or light blanket.
Regards