Patients occasionally have arthritis in both hips. If one hip is replaced, then they become symptomatic for the other pretty soon because the pain in the operated hip is gone. If patients have no pain in the other hip, they do not need to be treated for the other hip. If patients have pain in the other hip, they can be evaluated by the orthopedic surgeon, but in the absence of pain, they do not need to be concerned or to be treated for the other hip.