Nausea and vomiting when you are hungry may be caused by low blood sugar, improper diet or anemia. 1. Hypoglycemia: When hunger is excessive, the concentration of blood glucose in the blood decreases, and nausea and vomiting will occur when the body lacks energy. Timely replenishment of sugar or intravenous glucose dissolution can relieve the symptoms of nausea and vomiting. 2. Improper diet: Eating too fast and too much will cause the stomach to be stimulated by a large amount of food in a short period of time, which will lead to nausea and vomiting when you are hungry. It is recommended that patients improve their dietary habits, choose light and easily digestible food, and avoid overeating. 3. Anemia: when the patient combined with the presence of anemia, nausea and vomiting will also occur when hungry. Anemia is only a symptom, not a single disease, so the cause behind it needs to be determined before effective treatment can be carried out. Nutritional anemia, for example, can be treated by supplementing the deficient nutrients. Patients are advised to develop good dietary habits in their daily life. If discomfort occurs, it is recommended to consult a doctor in time to clarify the cause of the disease and target treatment under the doctor’s guidance, and do not take medication on your own to avoid delaying the condition.