Causes of menstrual cramps
Due to hormonal changes: rogesterone and prostaglandin in the blood increase abnormally
Due to inheritance from mother to child
Due to IUD placement
Eating unscientifically during menstruation, eating hot and spicy foods and cold foods
Due to too strong contraction of the muscles in the uterus to push menstrual blood out
Some gynecological diseases: endometriosis, cysts, uterine fibroids