What might cause osteoarthritis in the knee?

Osteoarthritis in the knee is primarily caused by excessive weight and joint stress over time. This condition occurs when the cartilage that cushions the bones in the knee joint gradually wears away, leading to pain and stiffness. When an individual carries excess weight, the forces exerted on the knee during daily activities, such as walking or climbing stairs, increase significantly. Over the years, this added stress can accelerate the breakdown of cartilage, making it a critical factor in the development of osteoarthritis.

Other factors like nutritional deficiencies or infections can play a role in joint health, but they are not the primary causes of osteoarthritis in the knee. While severe sports injuries can also lead to joint problems, osteoarthritis is more commonly linked to the cumulative effects of weight and repetitive stress over time.