Osteoarthritis, a common cause of knee pain, develops over time due to the wear and tear on the knee joint. This degenerative joint disease primarily affects the cartilage that cushions the ends of the bones, leading to its gradual breakdown. The loss of cartilage results in friction between the bones, causing pain, stiffness, and reduced mobility in the knee joint. Several factors contribute to the development of osteoarthritis, including age, genetics, past joint injuries, obesity, and overuse of the knee joint. It is a progressive condition, and while it cannot be entirely prevented, various treatments and lifestyle adjustments can help manage the pain and improve the quality of life for those affected by knee osteoarthritis.