I've had a shotty lymph node in my neck for over 10 years now. It has always remained roughly the same small size, mobile and soft. A couple of days ago it swelled up to around twice its usual size and feels much harder, although still movable. I've always had huge issues with HA and am extremely worried! I have a couple of insect bites on my neck and was wondering if this could have caused the swelling?

Someone please put my mind at rest! Thanks