Psoriatic arthritis happens when your immune system mistakenly attacks healthy cells in your body. (About 1.5 million 2 people in America have psoriatic arthritis.) If you are trying to determine ...

With psoriatic arthritis (PsA), it’s common to have problems with your ankles. You may have joint inflammation, pain, swelling, and stiffness. It may go along with issues in your feet, knees, and hips ...

Psoriasis is a tricky condition. It’s an autoimmune disease, meaning it happens because your immune system isn’t working the way it should. It sends out messages, speeding up skin growth. New cells ...

A combination of arthritis and the itchy skin disease psoriasis, psoriatic arthritis affects an estimated 1.5 million Americans. (Sebastian Kaulitzki/Science Photo Library via Getty Images) Catherine ...