This study is a clinical trial of an quasi experimental study. After getting permission from the authorities and informed consent of the participants in the study, patients undergoing discectomy through a available sampling of the number (60) were selected and random allocation block in the two groups will. Inclusion criteria were: age over 18 years, having the ability to understand language of Persian or Turkish, Lacking a history of allergy to plants, lack of pregnancy, lack of hypertension, The lack of clotting disorders and Having sense of smell and vision healthy. Since the use drug is in the form of inhaler and the pain of intensity will be evaluated using the VAS tool, sense of smell and vision before entering the people in the study by using test sense of smell, and visual acuity will be examined. In this study, the experimental group, the essential oil of lavender will be prepared of the company of Kashan Barych Esance, with the right concentration (recommended texts) through inhalation of used and then, at a certain level of pain intensity will be measured by using the VAS. Similarly placebo in the control group by the same method by the experimental group used and then pain intensity will be evaluated by means of tool VAS. In addition, in order to assess the impact of lavender essential oil compared with placebo, pain intensity in both groups before and after the intervention will be evaluated.