Overview
What it is.
Arthritis is a long-term inflammation of one or more joints that causes pain, stiffness, and a slow loss of motion. Osteoarthritis (the wear-and-tear kind) is the most common form, but rheumatoid arthritis and other inflammatory types respond well to physical therapy too. Symptoms tend to be worst first thing in the morning or after a long stretch of inactivity, and many patients find that the joint loosens up once they start moving.
