Vit.B12 deficiency can occur in vegetarians.
Milk products also contain Vitamin B12
. You can have Vitamin supplements which contain
Recomended dietary intake is 2 - 3 microgram per day.
If you donot have pain or fever
or other symptoms of infective lymphadenopathy
, antibiotics are not needed. Still if you are concerned you can have a FNAC test done for your lymph nodes.
I hope I am able to answer your query.