- Credit: Archant
Arthritis affects people of all ages, including children.
The two most common types of arthritis are osteoarthritis and rheumatoid arthritis.
Osteoarthritis is the most common type of arthritis in the UK, affecting around eight million people. It often develops in adults who are in their late 40s or older.
The condition can occur at any age as a result of an injury or be associated with other joint-related conditions, such as gout or rheumatoid arthritis.
It affects the hands, spine, knees and hips.
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In the UK, rheumatoid arthritis affects more than 400,000 people. It often starts when a person is between 40 and 50-years-old. Women are three times more likely to be affected than men.
Rheumatoid arthritis happens when the body's immune system targets affected joints, which leads to pain and swelling.
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People with rheumatoid arthritis can develop problems with other tissues and organs.