Rheumatoid arthritis is a long-term condition that causes joint pain and stiffness.
It’s an autoimmune condition, where the immune system mistakenly attacks the lining of the joints.
The condition causes the thin layer of cells that cover your joints to become sore and inflamed, said the NHS.
The main symptoms of rheumatoid arthritis are joint pain and swelling.
But, it may also cause other symptoms, including some signs in other parts of the body.
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