Why Do Periods Hurt?

Answer

Periods, also known as menstrual cramps, hurt due to contractions of the uterine wall when expelling menstrual blood. Contraction of the uterus is caused by substances occurring naturally in the body called prostaglandins. These pains can be relieved by having a hot bath, exercising, using a hot water bottle where it hurts or just taking painkillers.
Q&A Related to "Why Do Periods Hurt"
During menstruation, a hormone called Prostaglandin can be released in excess, in which the uterine wall contracts, which can cause pain, helped along by the fact that not much oxygen
http://wiki.answers.com/Q/Why_do_periods_hurt
Cramping is caused by excessive amounts of prostaglandin, a hormone-like substance. Thanks for asking ChaCha.
http://www.chacha.com/question/why-does-periods-hu...
There are several reasons for this pain: 1: Did you cut them recently? if you did you might of cut them too short. 2: you might have low circulation, try to avoid to much presure.
http://www.quora.com/Why-do-my-fingernails-hurt-wh...
Periods is when the unfertilized egg and blood is released from the uterus. It hurts because period is just another form of labor. Instead of contracting and pushing out a baby, the
http://answers.yahoo.com/question/index?qid=200812...
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