When the symptoms of dizziness appear when hungry, it should be considered that it is caused by hypoglycemia because blood sugar can provide energy to important organs and tissues and organs. When blood sugar is low, the energy of the brain is insufficient because the main supply of energy to the brain is glucose and there is no other way. Patients will also have sympathetic nerve stimulation, such as panic attacks after hypoglycemia, sweating all over the body, severe hunger, trembling of hands and weakness. If the blood glucose is further reduced, the patient may become unconscious and comatose, and may also develop hypoglycemic encephalopathy, in which the patient may show hallucinations, hallucinations or other mental symptoms. In this case, the patient should be given candy or drink to correct the blood sugar quickly, if not corrected in time, it may lead to coma.