Why do people get cramps in the first place
When you have your period, your uterus contracts to help get rid of the lining that has built up over the past few weeks. Hormone-like substances called prostaglandins, which are also involved in pain and inflammation, trigger those contractions, explains Christine Greves, MD, a board-certified ob-gyn at the Winnie Palmer Hospital for Women and Babies in Orlando.
The amount of prostaglandins in your body can vary and, when they’re high, you can have more severe period cramps, Dr. Greves says. While some discomfort during your period is expected, excessive pain isn’t normal and should be explored.