Women suddenly appear severe menstrual cramps, the common reasons are as follows: 1, cold: during menstruation, women’s pelvic organs are in a state of congestion, blood loss, when cold will aggravate the state, triggering severe gastrointestinal spasms, pelvic organ spasms, the phenomenon of increased dysmenorrhea; 2, bad emotions: women stored in excessive tension, anxiety and other bad emotions, can aggravate endocrine disorders, aggravate the symptoms of dysmenorrhea; 3, gynecological diseases: such as cervical erosion, uterine fibroids and other gynecological diseases, can make women’s dysmenorrhea symptoms aggravated.