Reiki for Cancer: Pain, Anxiety, and Stress

The goal of this clinical trial is to investigate the effects of Reiki, Sham Reiki, and Progressive Relaxation Exercise on the levels of pain, anxiety, and stress in cancer patients. The main questions it aims to answer are: * Question 1: The effect of Reiki applied to cancer patients on the level of pain within the time series is higher in favor of the intervention group. * Question 2: The effect of Reiki applied to cancer patients on the level of anxiety within the time series is higher in favor of the intervention group. * Question 3: The effect of Reiki applied to cancer patients on cortisol levels within the time series is higher in favor of the intervention group. * Question 4: The effect of Reiki applied to cancer patients on the level of stress within the time series is higher in favor of the intervention group. * Participants have answered the questions in the Individual Identification Form, Visual Comparison Scale, State Anxiety Scale and Perceived Stress Scale and serum cortisol levels were evaluated in the pretest. * Afterwards, the patients in the intervention group received Reiki for four consecutive days, the patients in the placebo group received Sham Reiki, and the patients in the control group received Progressive Relaxation Exercise. * The patients in the experimental group received Reiki to the seven chakra regions and additional areas with pain for a total duration of 25-30 minutes for four days, with an average of three minutes. * The patients in the placebo group received Sham Reiki to the seven chakra regions for a total duration of 25-30 minutes for four days, with an average of three minutes. * Progressive Relaxation Exercise (PRE) group patients received PRE for four days. * On the 4th day, pain and anxiety levels (0-10 Likert-type scale) of the patients were evaluated after the last applications. * On the 21st day, the day of the next chemotherapy cycle, pain and anxiety levels were evaluated, state anxiety scale and perceived stress scale were administered, and serum cortisol level was evaluated in the morning before the start of chemotherapy. * At the 3rd month follow-up, pain and anxiety levels (0-10 Likert-type scale), state anxiety scale and perceived stress scale were evaluated.