K.G.
My son has had a swollen lymph node on the back of his neck since 2 (he'll be 6 soon). I was SO freaked out when I first saw it but not anymore. He's seen 3 doctors and noone is concerned. It rolls, it hasn't gotten bigger and he never complain about it.
My friend (that is a natural health advisor) has had a lymph node for about 10 years on the back of his neck and it's no concern.
:)