Hello, Sorry about this illness. One sided painful ear with fever (and viral sore throat) makes use of antibiotic justified. Please use Amoxy or Azithro and see for a day, otherwise approaching an ENT specialist may be considered. Paracetamol can safely be given every 4 hours and additionally advil (Ibuprofen) may help relieve swelling.
Please make him gargle throat (face raised) using warm salt water. In his milk glass you may add small pinch of dry turmeric powder or use green turmeric root juice with honey.
Thanks. It turns out he has otitis externa, so he is having antibiotic drops into the ear. No systemic antibiotics are necessary, or advised.
Good for him. Easy to diagnose when ear drum was inspected. With lymph node enlargement and fever, local antibiotic may not suffice. Please observe for day or so.