Rheumatoid arthritis (RA) commonly causes fatigue and pain, stiffness, and swelling in your joints. Roughly 40% of people also experience one or more symptoms in areas outside the joint. These ...

Joint pain in your foot is often due to inflammation of the joints (arthritis). This can be from an underlying condition, injury, or infection in your foot or elsewhere. But noninflammatory conditions ...

When the immune system mistakenly attacks healthy cells in both the skin and joints, the result is psoriatic arthritis—a challenging condition that affects approximately 1 million Americans. While ...