If your joints are extra achy at this time of year, you're in good company. Wintery and wet weather can trigger flare-ups for the 53 million American adults dealing with arthritis, a condition that ...

Psoriatic arthritis (PsA) is an autoimmune disease that causes inflammation of the skin, joints, tendons, and nails. It can cause pain, swelling, stiffness, and reduced range of motion. Treatment of ...

Rheumatoid arthritis affects the body beyond joint pain — your heart, lungs, skin, vision, bone health, and more. Learn about ...