There are two possibilities for the patient to eat and vomit. First, there is an obstruction in the stomach and intestines, so there is no way to empty the food downward, but to return upward, which will manifest as vomiting. Second, stomach cramps. The latter two cases are often accompanied by stomach cramps, which need to be clarified by doing abdominal plain film or electrogastroscopy. If it is an obstruction of the stomach and intestines, surgical treatment is needed as soon as possible. If it is caused by stomach spasm, it needs to be treated with antispasmodic drugs, such as 654-2 or Gastroflucan. When the condition is stable, you should be able to eat, and when you eat, you should not eat irritating food, such as spicy and fried food, or drink alcohol.