Primary dysmenorrhea is the most common kind of menstrual pain, the U.S. National Library of Medicine says.
It is typically caused by an overabundance of chemicals produced by the uterus. These chemicals, called prostaglandins, trigger cramps when the uterus contracts and relaxes.
Pain associated with menstruation can start a day or two before your period and last for a few days or longer. The intensity of pain varies from woman to woman.
The agency suggests how to help ease menstrual pain:
- Use a heating pad or hot water bottle on the lower abdomen.
- Take a hot bath.
- Practice relaxation techniques, such as yoga or meditation.