Welcome to HCM.
You have a Non Specific chronic lymphadenitis
and Fine Needle Aspiration Cytology is suggestive of a chronic condition but not infective in origin.
You don't have to worry. Probably it is associated with dandruff
in the scalp
If the swelling enlarges in size or becomes painful, then you should consult your doctor again, otherwise ignore it.
Wish you all the best.