Can you have RA in just one hand?

Yes, it is possible to have rheumatoid arthritis (RA) in just one hand. While RA typically affects multiple joints in the body, it can sometimes present itself as a monoarticular disease, where it affects only a single joint. In this case, the hand may be the only affected area, with symptoms such as joint pain, swelling, stiffness, warmth, and redness. However, it's more common for RA to affect multiple joints over time, and it is considered a chronic inflammatory disease that affects more than one joint.