Postprandial dizziness is not necessarily insulin resistance, but may be caused by postprandial reactive hypoglycemia, postprandial hypotension and other factors. 1. Post-prandial reactive hypoglycemia: After eating a large amount of high-carbohydrate food, the body will cause a rapid rise in blood glucose, in order to reduce blood glucose, the body can secrete a large amount of insulin, and when blood glucose decreases too quickly, the symptoms of post-prandial dizziness may occur. 3. Postprandial hypotension: After eating, the gastrointestinal tract needs to digest the food, the blood entering the gastrointestinal tract increases, and postprandial dizziness may occur when the blood supply to the brain decreases. In addition, postprandial dizziness may also be related to Meniere’s disease, cardiovascular and cerebrovascular diseases, anemia and other factors. Patients who experience postprandial dizziness are advised to seek medical attention.