Bump on both shoulders

Rockwell

New member
I noticed in the mirror today I have a small bump on both shoulders.

Compared to that picture, though, the bump is much smaller, maybe 3/4 an inch in diameter when it is fully exposed (when I raise my arm it disappears). Also, compared to that picture, each bump is slightly lower behind my shoulder.

The bumps are hard, and feel like a bone. I've never noticed it before but then again I've never looked. Is it normal, and if not, what could it be?

Thanks for your help!
 
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