The symptom of dizziness and weakness when hungry is a normal physiological phenomenon. When the human body is in a state of hunger, the digestive system does not have enough food to convert into glucose, amino acids and other nutrients to ensure the normal operation of the body’s major systems. When the human body is undersupplied with blood sugar, the symptoms of dizziness and weakness will appear. In addition, when the stomach is fasting, the acidity of gastric juice will be enhanced, and under the influence of this, the mucous membrane tissue of the stomach wall will have physiological contraction and spasm, and lead to partial reflux of gastric acid into the esophagus and abdominal cavity, and the local mucous membrane tissue will be stimulated by acidic substances, causing patients to have panic attacks and chest tightness and other adverse reactions. The symptoms of hunger can be quickly relieved by drinking sugar water or eating high-calorie food.