The Effectiveness and Safety of LIVIA® Transcutaneous Electrical Nerve Stimulation (TENS) in Women Suffering From Primary Dysmenorrhea.

Inclusion Criteria: 1. Women between the age 18 to 45 years 2. Women reporting painful menstruation during the last 3 menstrual cycles. 3. Pain VAS score of at least 60 based on previous menstrual cycle 4. Subject is willing and able to comply with the study protocol and provide written informed consent to participate in the study. 5. Subject must agree to consistently use effective contraception throughout the study. (Subject not treated with oral contraception should use any contraception other than oral). Exclusion Criteria: 1. Participation in any other investigational study within 30 days prior and/or at the date of subject consent. 2. Woman with a significant medical condition such as: cancer, diabetes (Type I and II), irritable bowel disease IBD, immunodeficiency, autoimmune disease, etc. that in the investigator opinion, participation in the study would place the patient at an unacceptable risk. 3. Pregnant woman 4. A woman who is diagnosed with secondary dysmenorrhea associated with uterine myomas, endometriosis, adenomyosis, etc. 5. A woman who has cardiac condition with cardiac pacemakers, implanted defibrillators, or other implanted metallic or electronic devices.