I have a lump at the base of my neck on the right side. My doctor thinks it might be arthritis, since I have arthritis in my fingers. I was sent for an ultrasound, no results yet. The lump feels hard, like a bone, but I am occasionally having pain in my neck on the left, and some pressure when swollwing. I am 49, overwieght, but have last 20 pounds in the last 7 weeks. Firs noticed the lump 3 weeks ago.