When the blood sugar in the patient’s body is low, because the brain tissue and brain cells have almost no ability to store energy, severe hypoglycemia will lead to damage to the patient’s brain cells, and the patient may become dizzy, and at the same time, he or she may have memory loss and decreased reaction ability. In severe cases, hypoglycemic encephalopathy may occur, leading to mental and behavioral abnormalities, and even irreversible brain death, so not eating may cause dizziness. The most important manifestations of hypoglycemia are panic, sweating and hand trembling, which are more characteristic manifestations.