Question: what is the difference between rheumatoid arthritis and systemic lupus erythematosus?
Answer: RA, on the other hand, primarily attacks your joints. It affects the fingers, wrists, knees, and ankles. RA can also cause joints to deform, while lupus usually doesn't. RA can also be associated with inflammation in the lungs and around the heart in some cases, and with painful skin nodules.