Why do I have a painless crepitus in my right neck?

Hello doctor,

On the back of my right neck where the bottom of the skull is, I feel a lot of crepitus. This has been going on for a year and a half after my face and cheeks became thick (and hard), fat, and bloated (unevenly) for some reason (only my cheeks, everywhere else, I was as thin as before) for some time (now it is back to normal since about a year).

The crepitus is painless, but it feels like my neck vertebrae and skull are grinding with every movement. And whenever it is at its peak, I feel very congested and frustrated. Also, a lot of times when I look up at the ceiling, my neck in the skull base area audibly cracks (I can feel something snap), which has not happened before this. I am not sure what the problem is, kindly help.