hi, I have two lumps on the base of my skull - one on the right and left, but recently, the one on the right has become a bit larger. I understand that lymph nodes can be located there, but it s about an inch above my hair line. they are painless, but can ache when I have a headache. they re also very much immobile. I ve had these lumps for at least year. I m worried that I m either overthinking what it could be, or at times, underestimating the problem. I have not been sick in some time, so the swelling isn t due to an infection or anything viral. please help.