Medically reviewed by Scott Zashin, MD Key Takeaways Rheumatoid arthritis can cause pain and swelling in both shoulders.

The shoulder is a complex structure present on the upper body that connects the arms to the torso. It consists of many components that work together to provide stability and a wide range of movement.

(CNN) — When your shoulders ache or feel stiff, your first instinct might be to stretch or massage them. But the real culprit behind most shoulder problems isn’t surface-level tension — it’s more ...