There are a few things you need to tell here.How long has been the swelling been there,any associated symptoms other than numbness?Does the swelling feel hard or soft or firm.
is a benign condition and can present in any part of the body(except brain).Its usually soft or firm,variable size and mobille to certain extent when palpable.
However since you have been referred to a surgeon,he would be in aposition to diagnose the problem.
Yes, a possibility of getting a FNAB(biopsy
) and a ultrasound
All the best..