Similar to knee arthritis, hip arthritis is caused by gradual wearing-out of the cartilage in the weight-bearing areas of the hip joint. This is normal as one ages and there is a genetic predisposition for developing osteoarthritis present in many people. Inflammatory conditions (gout, rheumatoid disease, psoriasis, ankylosing spondylitis etc.) cause rapid cartilage breakdown. Trauma to the hip can result in accelerated arthritis, as can avascular necrosis (localised bone death). Arthritis treatment is non-surgical for many years. End-stage arthritis can be effectively treated with a hip replacement procedure.