A day if you do not eat after dizziness, want to vomit, is the following reasons: 1, from the point of view of Chinese medicine, at this time belongs to the deficiency evidence, due to weakness, blood deficiency, qi deficiency and kidney deficiency.2, from the point of view of western medicine, at this time, the most common disease is the hypoglycemic reaction, a day did not eat the intake of insufficient energy decomposition of excessive energy, energy intake is too little will lead to the body body body’s negative nitrogen balance. Blood sugar below 3.9mmol / L will appear dizziness, nausea, want to vomit clinical symptoms and clinical manifestations. Dizziness and vomiting after a day without food is also often caused by insufficient blood supply to the heart, such as insufficient energy metabolism in the body, ATP release when the cardiomyocytes will be ischemic and hypoxic, dizziness, accompanied by nausea, want to vomit clinical symptoms. Cerebrovascular ischemic attack can also occur, because the day did not eat cerebral blood supply will be incomplete, resulting in dizziness, want to vomit and other clinical symptoms.