Study aim: Determining the effect of aromatherapy with lavender extract on fatigue and work memory in women with multiple sclerosis referred to the Multiple Sclerosis Society of Rafsanjan in 2018 Design: Clinical trial with a control group, single-blind، Simple randomization by random-number table and random assignment by minimization method ،With a sample size of 60 patients، with parallel groups Settings and conduct: This study is done on the fatigue and working memory of women with multiple sclerosis referred to hospital of Rafsanjan University of Medical Science. Participants/Inclusion and exclusion criteria: desire to participate in the study; age range is between 20-40 years; Education: diploma or more; MS history for at least 1 year; No history of using the aromatherapy program during the past 6 months; No prohibition for aromatherapy ; No chronic illness (except for MS); No allergy, migraines, asthma and other respiratory diseases; Have a healthy sense of smelling Intervention groups: In the intervention group, in addition to routine therapies, aromatherapy with lavender essential oil is used by patients. Patients use 2 drops of 100% lavender essential oil (Barij essence, Kashan), using a droplet on a cotton ball then keep it at a distance of 5 cm and inhale for 10 minutes and do this for 14 days and mark the check list. In the control group, distilled water is used as placebo. Main outcome variables: fatigue and working memory