The incidence of Osteoarthritis increases with age and other factors which have been linked to Osteoarthritis such as fractures, ligament tears, muscle weakness, and obesity. Osteoarthritis is characterised by the enzymatic and mechanical breakdown of extracellular matrix, leading to degeneration the cartilage of the joints. The most common symptoms are pain and stiffness, with an associated reduction in joint range of motion. Accompanying pain and stiffness are limitations to normal activities of daily living such as getting up from a chair, walking, balance, and using stairs.

The process of inflammation in Osteoarthritis involves the release of proinflammatory chemicals. Fatty acids have been proposed to reduce chronic inflammation by reducing the chemicals associated with the inflammatory process.

Rheumatoid arthritis is an autoimmune chronic disease, mainly characterized by inflammation of the lining of the joints. Autoimmune diseases are illnesses which occur when the body tissues are mistakenly attacked by its own immune system. Rheumatoid arthritis can lead to long-term joint damage, resulting in chronic pain, loss of function and disability.

Rheumatoid arthritis progresses in three stages. The first stage is the swelling of the lining of the joints which causes pain, warmth, stiffness, redness and swelling around the joint. Second is the rapid division and growth of cells which causes the joint lining to thicken. In the third stage, the inflamed cells release enzymes that may digest bone and cartilage, often causing the involved joint to lose its shape and alignment causing more pain, and loss of movement.

Because it is a chronic disease, rheumatoid arthritis continues indefinitely and may not go away. Frequent flares in disease activity can occur. Rheumatoid arthritis is a systemic disease, which means it not only affects the joints but can also cause inflammation of the tissue around the joints, as well as other organs in the body. Early diagnosis and treatment of rheumatoid arthritis is critical if you want to continue living a productive lifestyle.

Currently, the cause of Rheumatoid arthritis is unknown, although there are several theories. Even though infectious agents such as viruses, bacteria, and fungi have long been suspected, none has been proven as the cause. The cause of rheumatoid arthritis is a very active area of worldwide research. Some scientists believe that the tendency to develop rheumatoid arthritis may be genetically inherited. It is suspected that certain infections or factors in the environment might trigger the immune system to attack the body's own tissues, resulting in inflammation in various organs of the body such as the lungs or eyes.

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