Musculoskeletal system is the framework of the body that protects the internal organs. Knee joints are complex structure where 2 bones meet to allow free movement and flexibility. Joints are surrounded by tissues, ligaments and tendons which act as a support structure to the joint and prevent dislocation and injury.

Cartilage is a smooth and strong material that lines connecting surfaces of the bones and prevents friction that would arise out of the bones that rub each other. Synovial membrane lines the joint and secretes fluid which provides lubrication and reduces bone erosion. Rheumatoid arthritis is an autoimmune disorder in which the bodies own immune cell attack the fluid secreting membrane that lines the joint leading to severe joint pain and swelling. Inflammation can also occur in tissue around the joint such as the ligaments, tendons and muscles. Chronic Rheumatoid arthritis (RA) can exist over a long periods of time.

Treatment for RA Include: Medication such as NSAIDs (Nonsteroidal Anti-inflammatory Drugs), corticosteroids, and DMARDs (Disease-modifying anti-rheumatic drugs).