Hello! Thanks for putting your query in HCM. I am a Gastroenterologist (DM).
Swelling in the neck and fever
suggest that there is some acute infection may be viral or bacterial. For which get evaluated by ENT specialist
doctor who may examine his neck, throat and some blood investigations like complete hemogram and may be culture. meanwhile continue with above paracetamol
for pain and fever.
I hope I have answered your query and this will help you. If you have any further query I will be happy to answer that too. Remain in touch and get-well soon.