Dizziness and weakness of the arms and legs due to hunger are symptoms of hypoglycemia. The causes are as follows: 1. Endogenous insulin overproduction. It is mostly seen in organic lesions, excessive insulin secretion and some autoimmune diseases. 2. Medication. Patients with diabetes mellitus apply insulin to regulate blood glucose dosage improperly, as well as after drinking a lot of alcohol often cause a transient increase in blood glucose, resulting in a large amount of insulin secretion, causing a decrease in blood glucose and hypoglycemic symptoms such as dizziness, excessive sweating, and weakness of hands and feet. 3. seen in some critically ill patients with multiple organ failure, endocrine and electrolyte disorders, and symptoms of hypoglycemia due to poor diet. 4. seen in When there is a deficiency of insulin antagonist hormones, such as pancreatic hyperglycemia, growth hormone, cortisol, etc.