Arthritis is one of the most common causes of pain in the hip. Arthritis is a progressive disorder, which means that it typically starts gradually and gets worse with time. The term arthritis literally means “inflammation of the joint.”
Following are different types of arthritis that can affect the hip.
Osteoarthritis (OA) is sometimes called degenerative arthritis because it is a “wearing out” condition involving the breakdown of cartilage and bones. With osteoarthritis, the cushioning cartilage at the end of the femur (thigh bone) may have worn down, making walking painful as bone rubs against bone.
Rheumatoid Arthritis (RA) is an autoimmune disease in which the body’s immune response negatively affects the lining of the joints (called the synovial membrane), causing chronic inflammation and pain. The synovium becomes thickened and inflamed. In turn, too much synovial fluid is produced within the joint space, which causes a chronic inflammation that damages the cartilage. This results in cartilage loss, pain, and stiffness.
Avascular Necrosis (AVN) results when bone is deprived of its normal blood supply. Without proper nutrition from the blood, the bone’s structure weakens, may collapse and damage the cartilage. Since this is most often seen at the ends of bones, your joints may be greatly affected. This is especially true of the hip joint and most commonly appears at the end of the femur, the long bone that extends from the knee to the hip joint.