The Effectivenes of Non-invasive Neuromodulation in Adult Women With Primary Dysmenorrhea, Through the TENS Stimulation at Different Times of Mentrual Cycle in Each Group

This intervention is performed using a TENS with an asymmetric biphasic wave of 200 µs width, frequency of 100Hz and maximum intensity tolerated by the participant, adapting to avoid accommodation. The intervention will be carried out for 30 minutes, once a day, and 2 days a week, with 48-72 hours between both interventions. Regarding the electrodes, 4 adhesive electrodes (5.0x5.0) will be placed, 2 in the lower lumbar region and two in the parasacral region (S2-S4).