Thanks for writing to health care magic.
from your explanation they seem to be lymphnodes
If the same occurs in a older baby i am not really worried.
Large lymphnodes in older children may require treatment or investigations. Small ones in them may not require treatment.
But in the newborn period you may have to investigate them.... first of all we will have to confirm what they really are by a physical examination. So you are requested to take your kid to the doctor.
Hope this helps.