, sore throat
, red eyes- may be a virus.
For fever- give him Acetaminophen
in a dose of 15mg /kg/ dose repeated every 6 hrs for 2 to 3 days. When temperature comes down, your son will be comfortable.
Give him some lozenges for sore throat- made of menthol/ honey.
Give him plenty of fluids.
Warm salt water gargling thrice a day will help for his sore throat.
If its viral, he will be okay in 3 to 4 days.
If fever persists after 3 to 4 days, he is lethargic, his oral intake is poor- please do not hesitate to see your Pediatrician
Wish your son a speedy recovery.