Thanks for the query
has no relation with the swelling. As he has gone through checkup and it is normal, no need to worry. Watch for any increase in size,any pain or redness
. In most of the cases this is reactive lymphadenopathy
and it usually subsides over a period of week to month. I would suggest you to just be watchful. FNAC may be needed for further evaluation.
I hope this answers your query effectively