No neck stiffness. My right upper arm. Arthritis in lower back, not arm. Symptom only when lifting or putting resistance on the arm when trying to lift, When pulling down on anything above my head, when putting any weight on my upper arm. no redness nor numbness. If I put any resistance onthat are, the pain is in the muscle mostly in the middle of my upper arm and it is excruciating lasting about a minute or so.
Thank you. It confirms the information I received on web md.