Hi, I have the exact same symptoms as you do. Swelling at base of neck and has been there since last June. It never fully goes away. Gets bigger once I just start moving in the day. By the end of the day they are quite swollen. Just noticed swelling going around to back of neck today. Doctor says he has never seen this before and doesn't know what is causing it. Had tests done and nothing showed up. There has to be a reason for this and frustrating that Doctor seem to think its nothing. I also had a hard time finding anything about this on the net. This is the first time I found someone else with the same symptoms. Wish this could be figured out.