my 15 yr old son has a knot on the back of his neck(left side) that has been there for a little over a week. it has gotten bigger since he first showed it to me.he says its throbbing and stinging. he has POTS too. not sure if that has anything to do with it.
POTS if you mean TB of the spine? then yes this could be an extension of the same disease or this could well be a new focus. this also could be due to an insect bite, its always good to go to your GP to get it examined. the possibilities by the description you give are enormous e.g an infected lipoma or a sebaceous cyst, an enlarged lymph node, an abcess, an insect bite and so on.