Osteoarthritis is that the commonest sort of arthritis, affecting many people worldwide. It occurs when the protective cartilage that cushions the ends of your bones wears down over time. Although osteoarthritis can damage any joint, the disorder most ordinarily affects joints in your hands, knees, hips and spine. Primary osteoarthritis is usually associated with aging. With aging, the water content of the cartilage increases and therefore the protein makeup of cartilage degenerates. Repetitive use of the joints over the years causes damage to the cartilage that results in joint pain and swelling. The cold and damp weather affects those living with arthritis as climate can create increased pain to joints whilst changes also occur to exercise routines. Jamison revealed however that the factor which will be liable for increased pain isn't snow, cold or rain, but actually, a change in atmospheric pressure .