Osteoarthritis in the knee is a very common condition that can have considerable impacts on the individual with regards to pain and disability. Furthermore, it has significant impacts for the expenditures to the healthcare system. The incidence with the problem is increasing with the heightened incidence of obesity that is the key risk factor for osteo arthritis of the knee. A number of researchers are declaring this a public health disaster and akin to the diabetes mellitus pandemic. The commonest risk factor is the weight problems, but those with a history of knee injury, probably from sport also are at a greater risk of knee joint osteoarthritis. There are some genetic risk factors for instance bow legs and also cartilage material in the knee that simply seems to be more prone to damage which are unable to really be changed like some other risk factors may.