Facts About Osteoarthritis

What It Is

Osteoarthritis is the most common form of arthritis and affects about 27 million Americans. Osteoarthritis has long been thought of as an inevitable part of the aging process, a disease of wear and tear in the joints. However, researchers now know that the disease involves the entire joint-the cartilage, joint, lining, ligaments, and bone-and that factors beyond wear and tear are involved, such as chemical changes that result in deterioration of bone and cartilage and inflammation in the joint lining. Osteoarthritis most commonly affects the joints we use most: hands, spine, hips and knees.

In osteoarthritis, the cartilage that covers the ends of bones and provides cushioning begins to break down. This leads to pain, swelling and difficulty moving the joint.

What It Feels Like

Some people can have x-rays riddled with osteoarthritis buy have few symptoms. Others can have pain and stiffness in the affected joints, particularly on waking, after exercise, or when weight or pressure is put on the joints. Morning stiffness can ease, usually within a half hour, with gentle movement. But over time, the pain and stiffness may grow, even interfering with sleep. The joints may seem to rub together and even make a crackling sound.