What is Psoriatic Arthritis?
Some people might hear “psoriasis” and think of the skin disease that causes itchy, scaly rashes and crumbling nails. It's true, psoriasis is an autoimmune disease that primarily affects the skin. But about 30 percent of people with psoriasis also develop a form of inflammatory arthritis called psoriatic arthritis (PsA). Like psoriasis, PsA is an autoimmune disease, meaning it occurs when the body’s immune system mistakenly attacks healthy tissue, in this case the joints and skin.
