You might develop lumps of tissue called rheumatoid nodules. They usually appear on your skin, especially on the elbows, forearms, heels, or fingers. They can appear suddenly, or grow slowly. The nodules may be a sign your rheumatoid arthritis is getting worse. They can also form in other areas of the body like the lungs and heart.
There’s also something called vasculitis, which is rheumatoid arthritis-related inflammation of the blood vessels. It shows up as spots on the skin that look like ulcers.
Other types of skin problems related to rheumatoid arthritis may appear, so always let your doctor know about anything new that pops up or breaks out.