The causes of hypoglycemia include: 1. insulinoma: more insulin is secreted, resulting in hypoglycemia in patients; 2. hepatic hypoglycemia: liver is the organ that stores energy and glycogen, if liver dysfunction occurs, such as liver cancer and cirrhosis patients with poor glycogen storage capacity, not eating can produce hypoglycemia; 3. early diabetic patients are prone to hypoglycemia 3-5 hours after eating (before the next meal) 4. functional hypoglycemia: some women often have hypoglycemia, especially when they are emotionally excited or anxious. 5. other rare diseases, such as insulin autoimmune syndrome, etc.