When an ulcer bursts the burst ulcer becomes a medical emergency and you need to get to the emergency room or urgent care as soon as possible.
If you have to you should get an ambulance if you have no other way to get to the hospital because when an ulcer bursts it can be life threatening.
When an ulcer bursts it can burn through the wall of the stomach, allowing digestive juices and food to leak into the abdominal cavity.
When that happens due to a burst ulcer the treatment is most always surgery to fix the burst ulcer so do not put off going to the emergency room or getting an ambulance if your ulcer bursts.
A burst ulcer is a serious medical emergency that can lead to death if left untreated.