For girls on their periods, then yes. This happens because when an egg is not fertilized in the ovaries, the uterus sheds its lining because it is not needed. The over flexing of the uterus may cause some soreness in the lower abdomen. Only some girls experience cramps however, and you can dull the pain usaually with a hot bath/shower, heating pad, and you could also get up and excersize or stretch.
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