When you are very hungry and want to vomit after eating something, it may be related to physiological reasons such as prolonged hunger, or pathological reasons such as acute gastroenteritis, peptic ulcer and other digestive diseases. 1. Physiological reasons: when the human body is in a state of prolonged starvation, due to the stomach and intestines for a long time without food supply, gastrointestinal function is weakened by the feeling of discomfort, there may be a very hungry stomach, but just eat will want to vomit the phenomenon. 2. Pathological reasons: if bacteria and other pathogens infections lead to gastroenteritis, nausea, vomiting and other digestive symptoms; such as gastric ulcer patients usually eat after the stomach pain, can be accompanied by nausea, vomiting, feeling of accumulation of food and so on. People who are very hungry and want to vomit after eating should go to the hospital in time to clarify the cause, and if treatment is needed, it should be standardized under the guidance of the doctor.