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Great question — these three conditions can feel surprisingly similar, which makes them easy to mix up. Here's a breakdown of how they differ:

Rheumatoid Arthritis (RA)
RA is an autoimmune disease where the immune system attacks the joints, causing inflammation, swelling, and pain. It typically affects the hands, feet Show Full Answer

Great question — these three conditions can feel surprisingly similar, which makes them easy to mix up. Here's a breakdown of how they differ:

Rheumatoid Arthritis (RA)
RA is an autoimmune disease where the immune system attacks the joints, causing inflammation, swelling, and pain. It typically affects the hands, feet, wrists, and knees. RA is progressive, meaning it worsens over time and can cause visible joint damage. It can also affect organs like the lungs, heart, and eyes.

Polymyalgia Rheumatica (PMR)
PMR is an inflammatory condition that mainly causes stiffness and pain in the neck, shoulders, hips, and thighs — usually on both sides of the body. It tends to come on suddenly and is more common in people over 50. Unlike RA, PMR doesn't usually cause joint swelling or damage, and morning stiffness tends to ease as the day goes on.

Fibromyalgia
Fibromyalgia is not an autoimmune or inflammatory condition — it involves the nervous system. The brain misinterprets pain signals, causing widespread pain, fatigue, brain fog, and sleep problems. It doesn't cause joint damage or swelling. Here's a quick comparison to summarize:

- Joint swelling/damage: RA ✅ | PMR ❌ | Fibromyalgia ❌
- Autoimmune: RA ✅ | PMR ✅ | Fibromyalgia ❌
- Widespread muscle pain: RA sometimes | PMR ✅ | Fibromyalgia ✅
- Progressive joint damage: RA ✅ | PMR ❌ | Fibromyalgia ❌
- Affects nervous system: RA ❌ | PMR ❌ | Fibromyalgia ✅

It's worth noting that people with RA are more likely than the general population to also develop fibromyalgia — around 20% of those with RA have both. A rheumatologist can help sort out what's driving symptoms, especially when they overlap.

 AI-generated responses are not a substitute for medical advice. These services are not intended to diagnose, treat, or cure any condition or disease. Always ask your doctor about specific health concerns.

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