What Causes A Lump At The Base Of The Skull?

Hi! So within the last week I have noticed a lump of sorts at the base of my skull, just offset from spine to telhe right. I read everywhere that is the location of the occipital lymph nodes, but am not sure. The past couple days, that area has felt tight and I get pains on that side of my head, wrapping around the top to behind the right eye. There pain ranges from tension headache to just a dull, occasional blip of pain. The lump is noticeable by feeling around in the area. Additional information, I have been suffering from what I would describe as hearing loss and ringing in my right ear the past 2 weeks. I have dealt with a clogged ear in the past and it just cleared up over time. However, with the discovery of this bump in that location, could these two issues be related? If so, how worried should I be? And suggestions on home treatment? I do realize seeing a doctor would be the preferred route here, but simply looking for some quick info to ease my mind in the meantime. Thank you!