Thank you for your query,
Your child seems to have a Viral illness as there are no other symptoms of infection.
You can give Crocin
syrup in prescribed dosage every 6 th hourly depending on the presence of fever and in high fever
you can do tepid sponging with lukewarm water after 5 to 10 minutes of giving Crocin.
You can give Meftal-P
syrup in prescribed dose.
But consult your Pediatrician
for the evaluation of fever and for specific treatment.
Hope I have answered your query.