The first acupressure application will be administered and taught individually by the researcher to the oncology patients in the self-administered group. Afterwards, each patient who learns the application will be asked to apply acupressure on his own for three days. In the self-acupressure group, a questionnaire form consisting of a personal information form, visual analog scale, nausea, vomiting and retching index and mental well-being scale will be applied first (pre-test) before the acupressure application is taught to the group by the researchers. Afterwards, patients will apply acupressure on their own for three days, and at the end of this period (post-test), a questionnaire consisting of personal information form, visual analog scale, nausea, vomiting and retching index and mental well-being scale will be applied. Acupressure will be applied the large intestine meridian 4th Point (LI4), the pericardium meridian Neiguan (P6) and Yintang (EX-HN3).

In this group, acupressure will be administered to stage I, stage II, and stage III cancer patients receiving at least one course of chemotherapy for a total of three days by researchers with acupressure certification. Before the application (pre-test) by the therapist, a questionnaire consisting of a personal information form, visual analog scale, nausea, vomiting and retching index and mental well-being scale will be applied to the patients in the group in question. At the end of the three-day acupressure application (post-test) applied to the patients included in the study by the therapist, a questionnaire consisting of a personal information form, visual analog scale, nausea, vomiting and retching index and mental well-being scale will be applied. In the acupressure group applied by the therapist, a total of three points will be applied to the upper extremity: the 4th point of the large intestine meridian (LI4), the Pericardium Meridian/Neiguan (P6), Yintang (EX-HN3) point.

In the self-acupressure group, before the application, the tissue sensitivity will be reduced by heating and rubbing for 20 seconds without direct pressure on the acupressure points, and the points will be made ready for acupressure application. Afterwards, sequential (breathing rhythm) compressions will be applied to the determined acupressure points by the researcher for a total of two minutes for each point without raising the finger, taking into account the pain threshold of the individual who is applied with the thumb, with 10 seconds of pressure for two seconds of relief. Two of the three different points (LI4 and P6) selected for the application will be applied symmetrically on the other extremity. Therefore, the session duration of each patient will be approximately 12 minutes, depending on the preparation and compression time on each point. Afterwards, acupressure will be applied to themselves by participants

The patient evaluates their own pain using a scale ranging from 1 to 10, with 1 = very mild discomfort and 10 = the most severe pain the patient can imagine. Ranges for pain intensity; <3 mild pain, 3-6 moderate pain, >6 severe pain.

Each response is scored as 0 = least distress, 4 = most distress. The patient's experience of nausea and vomiting in each of the 8 items is summed up. The highest possible value is 32, indicating the most severe symptom occurrence score.

The scale is in the 5-point Likert type and a minimum of 14 and a maximum of 70 points are obtained from the scale. Scoring of the scale is (1 = strongly disagree, 2 = disagree, 3 = somewhat agree, 4 = agree, 5 = completely agree).