Dysmenorrhea is a series of pathological symptoms associated with menstruation that interfere with daily activities such as abdominal cramps and pain in the menstrual period. General symptoms such as nausea, vomiting, lumbago, diarrhea and headache are also common. Primary dysmenorrhea refers to menstrual pain that does not depend on the underlying pathology. The kidneys act on the fascia of the psoas muscle. If the psoas muscle does not shorten and grow sufficiently, the kidneys may not move for a certain period of time and may experience ptosis. This causes venous ponding and may cause varicocele in men and primary dysmenorrhea in women. Techniques to be applied directly to the fascia of the psoas muscle can reduce symptoms of dysmenorrhea in women. In the literature review, no studies investigating the effectiveness of a treatment applied directly and only on the psoas muscle on primary dysmenorrhea were not found. This study can set an example for future studies. In our study, myofascial relaxation technique will be applied in women with primary dysmenorrhoea and its effect on pain will be examined.

Inclusion Criteria:

• The age range is 18-30,
• Intense pain compared to visual analog scale in the lower region of the abdomen during or just before the menstruation period (> 4),
• No pregnancy history,
• Not using drugs for dysmenorrhea symptoms

Exclusion Criteria:

• Not agreeing to participate in the study,
• Endometriosis, ovarian cyst, uterine fibroid, congenital malformation or pelvic inflammation,
• Having a diagnosis of secondary dysmenorrhea