Ladies, question about menstrual cramps?

Anonymous
Hey ladies! So, at my first years of menstruation, I remember well, I had abdominal cramps, like everybody else. But, as I grew up, I stopped having these. Unusually, these were replaced with intense lumbar cramps. Couldn't find any good article about this kind of cramp! So, ladies, anybody has the same problem? Could somebody link me a good article?
Ladies, question about menstrual cramps?
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