Furthermore, in the past couple of weeks, I have felt sharp pain in my right shoulder
and on the right side of my head,
and I have felt some pain in my lower back
and in the kidney area.
In December 2020, I had some kidney-related blood tests. Even though my BUN was 25 (normal range = 6 - 20), the doctor said that my kidney function was normal.
Given all of this arthritis (neck, chest) and this pain (shoulder, back, etc.