The evaluation of the pain appeals to the same strategy as to the younger subject but with some specificities, related more to the pathologies associated with the ageing than with the real age. For that purpose, the investigators have first of all scale of self-assessment as the numerical scale which is adapted to estimate the acute and chronic pains but this scale presents a bias because, certain patients do not express spontaneously their pain and this one must be attentively looked for in case of modification of behavior.