Patient was instructed on hypoglycemia. Hypoglycemia may result from a variety of causes, which include: Alimentary hypoglycemia. Hypoglycemia within 1 to 2 hours after a meal sometimes occurs when stomach contents empty into the intestines too rapidly. This causes the rapid absorption of glucose into the blood and an overproduction of insulin (hyperinsulinism) in response. This problem may develop after surgery for peptic ulcers, obesity, or other stomach problems.