Method: To evaluate differences between neuropathic and nociceptive pain assessed by DN4 and LANSS questionnaires; we conducted cultural adaptation into the Vietnamses language by means of conceptual equivalence, two questionnaire DN4 and LANSS from English to Vietnamese version, then proceeded evaluation in 268 in ChoRay hospital for neuropathic and nociceptive pain using between two questionnaires, evaluating reliability, and validity of both questionnaires from Vietnamese version, determining the sensitivity, specificity, positive and negative predictive values.