The primary cause of osteoarthritis is the degeneration of cartilage in the joints, often due to aging, joint overuse, and genetic predisposition. Other risk factors include obesity, which increases stress on weight-bearing joints, and previous joint injuries. Osteoarthritis leads to pain, stiffness, and decreased mobility, significantly affecting quality of life. It may also result in inflammation and bone growths. Managing risk factors, such as maintaining a healthy weight and engaging in low-impact physical activities, can be crucial in preventing or alleviating symptoms.