Background: Primary health care physicians manage most patients with osteoarthritis. Osteoarthritis (OA) is one of the leading causes of disability. The prevalence of OA is expected to increase because of ageing and obesity, and health care professionals must prepare for a rise in the demand for OA care. Osteoarthritis (OA) is the most common form of arthritis and the leading source of physical disability in elderly people. The Prevalence of OA is increasing and will continue to do so as the population gets older. The OA is predominantly managed in primary care centers by primary health care physicians and much can be done to alleviate symptoms from osteoarthritis by combinations of therapeutic options including pharmacological and non-pharmacological treatments, in the Kingdom of Saudi Arabia. The diagnosis is made by history, typical x-ray findings and non-contributory laboratory investigations. The understanding of the pathogenesis of the condition is undergoing change. The development of osteoarthritis is dependent on age, sex, genetic predisposition, and previous trauma to the joint and abnormal mechanical forces caused primarily by obesity.