Osteoarthritis is the most common form of arthritis affecting 10% of the population. Osteoarthritis affects both men and women with women having a higher rate of osteoarthritis. Osteoarthritis rates increase sharply after the age of 50.
The whole joint and the tissue around it can be affected by osteoarthritis, including the muscle around joints, tendons, joint capsule, and the cartilage inside. In the end stage of osteoarthritis, the cartilage that cover the bone inside the joint wear off leading to bone grinding on bone. This creates a painful sensation when weight is put on them, such as during walking, standing up, and climbing stairs.
As the condition progresses, pain and swelling of the affected joints become more frequent and even persistent. The joints may become crooked looking.
Almost any joint can be affected. However, osteoarthritis commonly develops in the knees, hips, spine, and hands.