Why do women experience cramps during their period?

Question

Yesterday I was fine, and all of a sudden as I am under the hair dryer at the salon, I got really bad cramps, and I just had to leave.

Why do we as females experience cramps during our period?

Answer 1

Because ur v****a is trying to squeeze the blood out

Answer 2

its something like your uterus is contracting to shed the uterine wall

hope i helped =)

Answer 3

because the muscles are contracting.