Hip pain, one of the common symptoms that patients complain of, may not always be felt precisely over the hip joint. Pain may be felt in and around the hip joint and the cause for pain is multifactorial. The exact position of your hip pain suggests the probable cause or underlying condition causing pain. Pain felt inside the hip joint or your groin area is more likely to be because of the problems within the hip joint. Likewise, the pain felt on the outer side of your hip, upper thigh or buttocks may be a result of the problems of the muscles, ligaments, tendons and soft tissues surrounding the hip joint. However, certain disease conditions affecting other parts of your body such as lower back or knees also cause hip pain.
Hip bursitis is a painful condition caused by inflammation of a bursa in the hip. Bursae are fluid- filled sacs present in joints between bone and soft tissue to reduce friction and provide cushioning during movement.
Avascular necrosis, also called osteonecrosis, is a condition in which bone death occurs because of inadequate blood supply to it. Lack of blood flow may occur when there is a fracture in the bone or a joint dislocation that may damage nearby blood vessels. Hip joint is most commonly affected; however, the knee and shoulder may also be involved.
Osteoarthritis, also called degenerative joint disease, is the most common form of arthritis. It occurs most often in older people. This disease affects the tissue covering the ends of bones in a joint (cartilage). In a person with osteoarthritis, the cartilage becomes damaged and worn out causing pain, swelling, stiffness and restricted movement in the affected joint. Although osteoarthritis may affect various joints including hips, knees, hands, and spine, hip joint is most commonly affected. Rarely, the disease may affect the shoulders, wrists and feet.
The hip joint is a “ball and socket” joint. The “ball” is the head of the femur, or thighbone, and the “socket” is the cup shaped acetabulum. The joint surface is covered by a smooth articular surface that allows pain free movement in the joint.