月經疼痛發生由於過度收縮子宮，它是經常發生於女士在生育的年龄.为了緩解這種疼痛的藥物，如止痛藥或肌肉鬆弛劑常常被使用。但是现在， TENS （經皮神經電刺激器）是一種新興终结疼痛了新的途徑。有了限制疼痛信號量经过神經可傳送到大腦的途径。利用這一點， TENS添加另一個神經刺激到神經傳遞經期疼痛信號向大腦的路徑。 所以它擾亂疼痛信號的傳輸，因此它得到緩解疼痛.再者， TENS本身可以減輕疼痛，同時激活激素的分泌，如內啡肽，它是有效的放鬆期間的疼痛。

Period pain (menstrual pain) happens due to excessive contraction of uterus and it is frequently occurred to ladies in childbearing age.To alleviate this pain, the medication such as painkillers or muscle relaxant has been used. But these days, TENS (Transcutaneous Electrical Nerve Stimulator) is emerging as a new way of relaxing period pain. There is a limit in amount of pain signal that the nerve can transmit to brain.

Using this point, TENS add another neural stimulation to the path that the nerve transmit menstrual pain signal to brain.
So it disturbs the transmission of pain signals and consequently it gets to relieve period pain.Additionally, TENS itself can alleviate the pain while activating the secretion of hormone such as endorphins, which is effective in relaxing period pain.

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