Welcome to Healthcare Magic Forum
Your son seem to be having Cervical lymphadenitis
This presents as a tender, smooth lesion in the cervical region .
It can be associated with fever
and other systemic symptoms.
It is important whether you are also suffering from any other problems like Upper respiratory infections, sore throat
, cough or tonsillitis
As such lymph node swellings usually occur as a protective response in our body in order to contain any such infections.
Also, if it is an acute swelling, as it is in your case, then it is relieved as the primary infection heals or is treated.
So you might need a course of oral antibiotics
along with pain killers.
I would suggest that you see a general physician who can locate the focus of infection and treat you accordingly.
Hope it helps
Wishing you speedy recovery
Dr Geetika Paul