Dizziness when hungry may be caused by hypoglycemia, which is easily caused by hunger. Hypoglycemia easily causes ischemia and hypoxia in the brain, and dizziness, nausea and vomiting can occur when the cerebellum and brainstem are ischemic and hypoxic, and patients can also have balance disorders and ataxia, and some patients may also have palpitations, chest tightness and shortness of breath, and blood sugar should be monitored. If patients have low blood sugar, they should supplement sugar in time, they can take sugar water or sugar cubes, and if necessary, they should be treated with intravenous push of high sugar to prevent signs and symptoms of severe hypoglycemia or prolonged hypoglycemia causing hypoglycemic encephalopathy, resulting in irreversible neurological deficits in the brain. Patients with hypoglycemia are mainly seen in patients with weakness, improper use of diabetic drugs and starvation.