Answer:

Rheumatoid arthritis causes stiffness (especially in the mornings), swelling, and, often, crippling pain. It may also cause fatigue, anaemia and weight loss. Rheumatoid arthritis is an autoimmune disorder: it is a "self-attacking-self" disease. The body's immune system improperly identifies the synovial membranes as foreign. Inflammation results, damaging cartilage and tissues in and around the joints. Normal spaces within the joints become narrowed and the bones may even fuse together.

First answer by Robbb. Last edit by Robbb. Contributor trust: 2277 [recommend contributor recommended]. Question popularity: 2 [recommend question].