Welcome back to Healthcare Magic Physician's Desk!
I would advise you to wait and watch about the swelling.
It can be some temporary problem like a inverted papilloma
or a small boil under the skin or a cyst
as you have been told, sometimes these problems regress by themselves in a few months.
They are nothing serious and can be removed surgically anytime if start increasing in size.
Wish you a great health!