Inclusion criteria:
Being Iranian
Declaration of consent to participate in the study
Age range from 18 to 38 years
Having any degree (one, two, or three) of primary dysmenorrhoea
having regular menstrual cycles with intervals of 21 to 35 days and a duration of 3 to 10 days at least during the last six months
Obtaining a score of 8 or higher on the HADS questionnaire
Access to smartphones
Exclusion criteria:
History of genital diseases, surgery, and known and chronic underlying diseases
Taking birth control pills
Having hormonal disorders, irregular menstruation
Pelvic infection, burning and itching, and abnormal vaginal discharge
Professional sports activities
Complaining about another pain in the hip area according to the student
Current or history of severe mental illness such as severe depression, bipolar, suicidal thoughts
Consumption of psychoactive substances or alcohol and drugs
Having symptoms of depression or anxiety
Taking anti-depressants and anxiety medications during the study
Participation in other psychological interventions such as psychotherapy, meditation, yoga
The occurrence of stressful events at least six months before the start of the study