Arthritis is a general term that describes inflammation in joints.
Inflammation is characterized by redness, warmth, swelling and pain. This symmetry helps distinguish rheumatoid arthritis from other types of arthritis. In addition to affecting the joints, rheumatoid arthritis may occasionally affect the skin, eyes, lungs, heart, blood, nerves or kidneys. Rheumatoid arthritis affects everyone differently. In most patients, joint symptoms develop gradually over several years.