Rheumatoid arthritis is an
autoimmune condition, which means that the immune system attacks healthy cells of the body by mistake. In the case of rheumatoid arthritis, the immune system attacks the tissues that line the joints, causing painful inflammation.
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RA typically affects the hands, feet and wrists, often symmetrically on both sides of the body.2 It can also cause more general symptoms such as fatigue, fever, sweating, loss of appetite, and weight loss. When symptoms become worse, it’s called a flare or flare-up.3
The exact cause of rheumatoid arthritis is unknown, but there are several known risk factors that may increase your chance of developing this condition. Women are two to three times more likely than men to get RA.3
You also have a higher risk if you’re:4- between the ages of 40‒60
- have a relative with the condition
- overweight
- a smoker
You can find out more about RA, including causes and symptoms, in our
rheumatoid arthritis guide.