Rheumatoid arthritis symptom bumps

There is no single test for rheumatoid arthritis. Sometimes rheumatoid arthritis can cause bumps called nodules to form over the elbows, knuckles, spine, and lower leg bones. See a picture of the most commonly affected joints. The disease usually affects both sides of the body at the same time. The disease also runs in some families. This means that the body's natural defense system attacks the joints. But rheumatoid arthritis is an autoimmune disease.