The effectiveness of Leventhal model self regulation on the severity of premenstrual syndrome symptoms

INTERVENTION: Intervention 1: The intervention group will receive group‐based training based on Leventhal’s Self‐Regulation Model in four weekly sessions, each lasting 60–90 minutes. The content of the training sessions will include introduction to illness perception, identification and modification of maladaptive beliefs related to Premenstrual Syndrome ( PMS), cognitive restructuring, emotion regulation training, bodily awareness, practice of coping skills, and development of an individualized PMS symptom management plan. The sessions will be conducted by the researcher. In addition to receiving the training, participants will be assigned homework, including daily symptom monitoring, relaxation exercises, and implementation of a self‐care plan. . Intervention 2: Control group: The control group will not receive any educational intervention during the study period. After the completion of data collection, a single intensive educational session will be offered to them if they wish to participate. CONDITION: N94.3 pre menstrual syndrome. ; Premenstrual tension syndrome PRIMARY OUTCOME: Severity score of premenstrual syndrome symptoms in the Siah bazi questionnaire. Timepoint: The severity of premenstrual syndrome is measured at baseline before the training, immediately after the training, and 8 weeks after the completion of the training. Method of measurement: Premenstrual Symptoms Screening Tool (Siah bazi). INCLUSION CRITERIA: Having a regular menstrual cycle in the last 6 months unmarried (single status) Presence of moderate to severe premenstrual syndrome (PMS) symptoms Normal Body Mass Inde X(BMI) Access to a smartphone and the internet ( for following)