How do I know I have a swollen lymph node? I have a couple lymph nodes that slightly (very slightly, probably 0.2cm) protrude from my neck, each being no more than 1cm in diameter (1 might 1.5 cm, but no more)? I saw my GP and she said those WERE the lymph nodes and they're supposed to protrude ever-so-slightly. My question is, how would I know IF it IS swollen? I mean, how big would it actually have to get? If anyone has any info on this, it would be great