Anita C. Chandrasekaran

2 weeks ago | health.com | Rena Goldman |Anita C. Chandrasekaran

PixelsEffect / Getty Images Rheumatoid arthritis (RA) is an autoimmune disease that causes your body’s immune system to attack its own tissues. It causes inflammation in joints and other areas, which can lead to pain, stiffness, and decreased flexibility and mobility. Rheumatoid arthritis is the most common type of autoimmune-related arthritis. It’s estimated that about 1.3 million adults in the United States (0.6-1% of the adult population) have RA.

1 month ago | health.com | Sarah Bradley |Anita C. Chandrasekaran

Jacques Hugo / Getty Images Psoriatic arthritis (PsA) is a chronic (long-lasting) condition that combines the skin-related symptoms of psoriasis with the joint-related symptoms of arthritis. PsA is an autoimmune disease, meaning it causes your immune system to attack healthy cells in your body. PsA feels different for everyone. Symptoms can be mild to severe, affecting some or many parts of the body. Most people will have psoriatic plaques and some joint inflammation.