Effects of Transcutaneous Vagus Nerve Stimulation (taVNS) in Individuals With Primary Dysmenorrhea

Current will be applied bilaterally from the tragus and turbinate parts of the ear with the VagustimTM device. The current frequency to be used in modulation mode is 10 Hz, and the pulse width is 300 μs (In modulation mode, the pulse rate and width are automatically changed in a loop pattern. The pulse width is reduced by 50% from its original setting in 0.5 seconds; then, the pulse rate is changed in 0.5 seconds, reduced by 50% from the original setting. Total cycle time is 1 second.). The current intensity will be applied for 5 minutes, keeping the current constant where the participant feels comfortable.

For 5 minutes, sham applications will be applied using a current-free headset specifically designed for this purpose. Participants will observe the device's functionality, but it will not supply any current.