It consisted of fifteen subjects who received muscle energy technique (Mitchell relaxation osteopathic technique). Two sessions per cycle for three cycles before menstruation by one week and after the end of menstruation by one week. In addition to their medical treatment non-steroidal anti-inflammatory drugs (NIAIDS).

It consisted of fifteen subjects who took their medical treatment only (non-steroidal anti-inflammatory drugs (NIAIDS)).

Muscle energy technique:

1. Application of MET for bone of pelvis:

   I) Pubis:

   1. Cranial Os pubis.
   2. Caudal os pubis.

   II) ileum:

   1. Anterior ileum.
   2. Posterior ileum.
   3. External Rotation (In flare) Lesion.
   4. Internal Rotation (Out flare) Lesion.

   III) sacrum:

   1. Forward torsion of sacrum.
   2. Backward torsion of sacrum.

2. Muscle energy technique for specific muscles of pelvis and spine:

   1. Stretch of the Psoas Major.
   2. Stretch of the paravertebral muscle.
   3. Stretch of the piriforms.

It will be used for measuring the body weight and height of each patient participating in the study to calculate the patient's body mass index (BMI).

Body mass index (BMI) = Weight (Kg

ain will be assessed by visual analogue scale. It is 10 cm horizontal line with one end described as (no pain=0) and other end (worst pain=10). It was considered a valid way for assessing pain. It allowed graphic representation and numerical analysis of collected data (Boonstra et al., 2008) (Appendix III).

The MDQ is a 46-item self-report inventory for use in the assessment and treatment of premenstrual and menstrual symptoms. The MDQ can distinguish cyclical from noncyclical changes in physical symptoms, mood and behavior, and arousal.

Maximal vertical mouth opening (MIO):

From sitting position, with the use of the calliper, the distance between the incisal edges along the midline of the upper and lower central incisors without pain was measured, by placing one end of the poley gauge against the incisal edge of one of the upper central incisors, and the other end against the incisal edge of the opposing lower incisor.

The distance recorded in millimeters, the subjects was instructed to" open your mouth as wide as possible without causing pain or discomfort". The poley gauge was sterilized with antiseptic solution before and after each measur