The word “arthritis” describes pain, stiffness, and swelling in the joints. It can be a bit of a nuisance or extremely ...

They’re usually found on your elbows or knees. PsA can also affect your nails. Psoriatic arthritis is a complex disease that ...

Rheumatoid arthritis (RA) is an autoimmune disorder that causes inflammation, pain, and stiffness in the joints—usually in ...