You have lymphadenitis
with fever and chills
This may be a bacterial infection.
Do a Pus culture and sensitivity.
Choose the antibiotic accordingly and take full course.
Do an incision and drainage
of the swelling and provide proper wound care.
The other likely diagnosis is TB adenitis.
Rule out TB.
If it is due to TB then Antituberculosis Treatment is needed.
Screen for any immune deficiency