Change of VAS before and after application of machine Immediately before application of machine and 20minutes after application of machine [clinicaltrials_resource:5f7033def435cd542eb1f215c97877d8]

Measure the change% of VAS between before application of machine (T0) and 20 minutes after application of machine (T20) in every episode of dysmenorrhea during 1 menstrual cycle The mean of change% of VAS is primary outcome measure

Change of VAS before and after application of machine Immediately before application of machine and 20minutes after application of machine [clinicaltrials_resource:5f7033def435cd542eb1f215c97877d8]

Measure the change% of VAS between before application of machine (T0) and 20 minutes after application of machine (T20) in every episode of dysmenorrhea during 1 menstrual cycle The mean of change% of VAS is primary outcome measure