I certainly did overlook information mentioned in your original post, I apologize...
In fairness, I did ask if you had been examined in order to rule out a
heart problem as a possible cause of your pain. Unfortunately,
genetics are only a part of the picture with heart disease (or any
disease for that matter). Because of this, a lack of family
history does not guarantee that you do not have heart problems.
Were I in your situation, I would get my heart checked out.
With regard to other possible causes of your arm pain -- injury, a
pinched nerve or a disease process (such as a tumor) come to
mind. If your other arthritic symptoms are confined to your
joints -- that would seem to point away from arthritis as a
cause. However, pain can sometimes manifest some distance away
from the actual cause/source.
With a general symptom of this nature -- one that has so many possible
causes -- diagnosis is, more often than not, a process of elimination.
Seeing a rheumatologist and/or an orthopedist may help you to find an answer.
Again, I apologize for my lack of focus in the beginning.
Let me know if you need more input. If not, thanks for the
opportunity to assist you... Please honor my efforts by Clicking the
green 'Accept' button (located within this post -- above-right).
Adding a bonus -- should you wish to do so -- would be warmly welcomed.
Good Luck!
Steve
__________________
Counselor /listener/collaborative problem solver. Thanks!