What else causes similar symptoms to osteoarthritis?
Other forms of arthritis can cause some of the same symptoms as osteoarthritis, such as pain and stiffness in the joints. Rheumatoid arthritis is the second most common form of arthritis, and if untreated it is more disabling. It is caused when the body’s immune system begins to attack the joint lining tissue (synovitis). Over time, cartilage and bones in the joints also get damaged and destroyed. It is a chronic condition that causes pain and swelling, leading to reduction in movement. It usually starts between the ages of 30 and 50. Three times as many women are affected as men. Your NHS Guide to rheumatoid arthritis describes it in more detail. Another condition, known as a Baker’s cyst (sometimes called a popliteal cyst), can cause the same symptoms as osteoarthritis of the knee. A Baker’s cyst is a lump filled with joint fluid that forms behind the knee. It may form after an injury, but may also appear for no reason. Baker’s cysts range in size and most do not cause any pain. Occa
