In studies, TENS has been found more effective than placebo in relieving the pain associated with menstrual cramps.
研究表明TENS安慰剂更能缓解经痛引起的痛楚。
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This type of menstrual cramp can cause mild to severe pain in your stomach, back and thighs a few days before your menstruation and lasts for roughly 12-72 hours.