After the gestational sac out of the stomach still appear pain, there are mainly the following reasons: First, although the gestational sac has been discharged, but the uterine cavity has a bruise, bruise stimulation will also cause uterine smooth muscle contraction, so it will lead to tummy pain, with the reduction of bleeding, the symptoms of tummy pain will also gradually reduce. You can drink a bowl of hot brown sugar and ginger water, which has the effect of driving away cold and warming the uterus, so that the blood in the uterus flows out more smoothly, reducing the symptoms of stomach pain. Second, incomplete abortion caused by, although the pregnancy sac has been seen, but if the uterus is still residual desiccated tissue, the same will stimulate to cause uterine contractions, but also accompanied by vaginal bleeding, relatively more, often greater than the amount of menstruation. It is advisable to talk to your doctor in time, and if necessary, you may need to have a clean uterus to achieve a complete miscarriage.