Reactive hypoglycemia is abnormally low blood glucose levels that occur after a meal. Fasting can trigger an episode. Common symptoms include jitteriness, weakness, lightheadedness, confusion and anxiety. It usually occurs during a fast. The hypoglycemic diet can help alleviate these symptoms. Small evenly-spaced meals during the day will help you avoid hypoglycemia and maintain steady glucose levels. You must eat every three hours. Eliminate foods with excessive sugar to avoid glucose spikes. Eating 10 to 20 grams of a carbohydrate-rich food, such as fruit, crackers, bread or a regular soda can return your restore your blood sugar within minutes.