Why do women get grumpy during periods?

Question

Is there any other reason, like a scientific reason, that women get nasty during periods other than pain?

Answer 1

 Omg... -sigh- I'm experiencing it right now grrr.. I'm so pissed at myself for getting so mad about everything! grr! But anywayz yes, I agree. It's because of our hormones (And I wish my hormones would stop producing anger hormones each minute I have my periods!) But yes.. Hormones hormones hormones. It's all about the hormones! and also because of the blood flow of your blood. Kind of like what happens to people that are drunk, their veins open up so there's a rush of blood in the veins that makes them all moody and all that.. phew I'm glad I learned from Health class...