Was just changing her nappy and happened to feel it, I know I shouldn't go looking but I thought I'd just check. It's about size in diameter of a malteeser. She has bad excema on her legs, is this the cause. Going to get her in at docs tomoz but I have a sick feeling in my tummy. She is 12m old. Very healthy, active, happy etc. Oh god am so worried never felt a lymph node that big before. Any experience?