Rheumatoid arthritis (RA) is an autoimmune disease that causes chronic inflammation of the joints. This condition can also affect the tissues surrounding the joints (muscles, tendons, ligaments) as well as other organs of the body (skin, blood vessels, heart, lungs and muscles). RA is a chronic condition and it tends to last for many years though there are periods in between when the patient is without any symptom. RA is a progressive condition and over a period of time, it causes joint destruction and functional disability.