I've just found a rather large lumpion dd's neck. It's 1-2cm across, just below her jawline, roughly in line with her ear, tucked between the tendons (?). It's only visible if she bends her head to the other side. Not painful at all - I only discovered it while absent-mindedly rubbing her neck.
The GP is going to tell me "that's a Doohicky Watsit - everyone has them" - isn't she?