Osteonecrosis of hip is a disruption or reduced blood flow to the femoral head or thighbone, leading to a deterioration of bone segment in the hip as bone cells require a consistent blood supply to stay healthy.

Hip osteoarthritis is a degenerative hip joint disease that commonly occurs in elderly people. However, hip osteoarthritis can also occur in the younger group of people as well because the joints may not have formed properly or there may be birth defects in the cartilage of some people,