Thank you for your query on Healthcare Magic,
The child seems to have throat infection
and this is the cause for fever, throat pain and headache.
You can give paracetamol
syrup in prescribed doasge every 6th or 8th hourly depending on the presence of fever.
Maintain hydration by giving plenty of oral fluids and water and give soft diet
Consult your Pediatrician
for the examination to find out the focus of infection and its specific treatment.
Hope i have answered your query.