The patient’s dizziness without eating is actually brought about by low blood sugar. When the blood sugar is low, the patient’s brain nerve tissue and brain cells will also have a sugar deficiency, which will manifest as ischemia and hypoxia energy deficiency, and the patient with brain nerve dysfunction will show the symptoms of dizziness. In this case, the patient has to raise the patient’s blood sugar by eating, and the patient’s dizziness symptom can be improved quickly. When hypoglycemia occurs, there may be other manifestations in the central nervous system, such as mental depression, inattention, drowsiness, emotional irritability, and hypoglycemic reactions, such as mental abnormalities and behavioral abnormalities, which may lead to coma, convulsions or even death in severe cases.