Thanks for writing to HCM
You need proper clinical examination and investigations.
You didn't mentioned your age and sex.
Proper history should be taken like history of fever
,pain,duration of illness etc.
So ,better you consult your physician.
Investigations include routine hemogram,RBS, Chest x-ray( PA),ultrasound
of abdomen,FNAC of swelling if needed etc.
There may be many reasons for such swelling.
Treatment should be based upon clinical findings and investigation reports.
Get well soon.