Nausea and vomiting when you are especially hungry may be caused by low blood sugar due to hunger; or you may be suffering from digestive diseases, such as atrophic gastritis; or you may be suffering from electrolyte disorders. 1. Hypoglycemia: excessive starvation of the body can not replenish energy, may lead to excessive consumption of sugar, thus causing hypoglycemia, nausea, vomiting and other symptoms, when serious, you will feel weak, lack of energy. 2. Atrophic gastritis: belonging to a kind of gastritis, patients with atrophic gastritis will have nausea, vomiting and other symptoms, such as long-term inability to eat, the symptoms will be significantly aggravated, and will be accompanied by abdominal pain, abdominal distension. 3. Electrolyte disorders: If prolonged inability to eat leads to electrolyte disorders, causing low potassium, low sodium, etc., it may induce nausea, vomiting and other symptoms. If you feel nausea and vomiting when you are hungry, if it is only temporary, it may belong to physiological manifestation, generally no special treatment is needed, and the symptoms can be relieved after eating. If nausea and vomiting still occur after eating, it is considered to be a pathological factor, which requires timely consultation and professional examination to analyze the cause of the disease.