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.
这种类型的经期痉挛会导致你的胃，背和大腿在例假来临几天之前的温和甚至严重的疼痛，而且会持续大概12 - 72个小时。
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