Because the pelvic cavity is congested during menstruation, individual women who are more sensitive will experience a feeling of abdominal cramping, and most of them will return to normal after rest. There are also pathological phenomena caused by inflammation in the pelvis or tumors in the pelvis, which lead to pelvic congestion during menstruation and aggravate the original inflammatory congestion, so it will lead to a feeling of falling abdomen. If there is a tumor, it can also lead to a feeling of falling in the abdomen when you have your period. Therefore, if this feeling occurs during menstruation, it is recommended to go to the hospital for examination after menstruation clears, and then decide whether to give treatment according to the cause.