Is extreme backpain during a period normal?

(I got this information from searching google)

Causes of Menstrual Back Pain Back muscle pain can be caused by the same hormonal changes that cause abdominal cramping during the period. Chemicals called prostaglandins are responsible for promoting uterine contractions during menstruation. These same chemicals can cause havoc throughout the body, and especially in the lower back muscles. This condition can be much worse in women who also suffer from hormonally induced pre-menstrual syndrome. The chemistry occurring in her body can cause physical and emotional symptoms for up to 2 weeks every month!

Treatment for Back Pain During Your Period There are prescription drugs and hormonal therapies available. I would recommend avoiding these unless your symptoms are out of control. The side effects and health risks are just too great to justify their use for mild pain symptoms during menstruation. Try some OTC pain relief instead. Midol or Advil are indicated as popular remedies for cramping and pain. Believe it or not, one of the best treatments is WATER. Much of the discomfort that women suffer during their period comes from dehydration. This is exacerbated by some women losing their appetite for food and drink during their menstrual time. Make sure to drink lots of water and you might be surprised at the positive results you will experience.