Rheumatoid arthritis (RA) is a chronic autoimmune disease that causes inflammation throughout the body and most often affects the joints, leading to pain, stiffness, swelling, and reduced mobility. While RA is commonly thought of as a disease that primarily affects women, it also occurs in men — just less often. About 70 percent of people living with rheumatoid arthritis are women, meaning about 3 in 10 people with RA are men. RA can affect multiple joints, especially those in the hands,…