Lavender oil in 15 ml opaque dark colored bottles closed with metal caps to prevent volatility to the venture group and 40 2×2 cotton pads were delivered. Patients were asked to apply lavender oil 30 minutes before going to bed. Deep breathing increases the concentration of aromatic substances in the body. The time it takes for essential oils to be absorbed into the blood circulatory system is about 30 minutes for complete absorption by the body. Information was given about dripping 3 drops of lavender oil on cotton pads and placing them 15-20 cm away from the pillow. Patients were told that they should apply lavender oil for 30 days and re-prepare the lavender oil dripped onto a new pad each night, and that the bedroom should be ventilated and free of different odors. A message was sent to the patients to remind them of the application on their phones for 30 days.

No intervention will be applied to the control group.

The patients participating in the study were provided with the steps of applying lavender oil by inhalation, the points to be considered during the application, and the application was done in the same way by all patients.

The Turkish validity and reliability of the Fatigue Severity Scale, developed by Krupp et al. (1989), was determined by Armutlu et al. made by The scale is a 7-point Likert-type scale consisting of nine items. Each item is defined as 1 = strongly disagree, 7 = completely agree. The score that can be obtained from the scale varies between 9-63, and when divided by the number of items, the lowest score that can be obtained from the scale is 1 and the highest score is 7.

In 1989 Buysse et al. It was developed by Psychiatry to evaluate sleep quality in clinical studies and psychiatry practices. PSQI, which consists of 7 main headings: subjective sleep quality, sleep latency, sleep duration, habitual sleep efficiency, sleep disorders, use of sleeping pills and daytime functions, evaluates sleep quality in the last month. Each subheading is evaluated between 0-3 points.