What causes menstrual cramps and pain?
The cramps of primary dysmenorrhea are caused when your uterus contracts to push out the menstrual blood. Hormonal changes occurring naturally throughout your cycle can add to the pain; it’s thought that imbalances between the hormones progesterone and estrogen worsen menstrual cramping. And when there’s an overabundance of the hormonelike chemicals called prostaglandins, the uterus goes into spasms and racking cramps can result.
