Diabetic patients who are hungry at night can eat snacks, but it is recommended to carry out blood glucose measurement, while injecting short-acting insulin or oral hypoglycemic drugs. Prolonged hunger in diabetic patients may cause hypoglycemia and other conditions to occur, so it is recommended that patients eat moderately when they are hungry, and they can eat a snack. Because of type 1 diabetes insulin secretion is insufficient, so before eating snacks should be timely injection of short-acting insulin, before going to bed injection of long-acting insulin, to prevent blood glucose fluctuation is too large. 2 diabetes mellitus patients are recommended to take glucose-lowering medication before or after eating snacks, the specific time according to the glucose-lowering medication to judge, to be able to prevent blood glucose fluctuations in a short period of time is too large. Patients are advised to eat under the guidance of a specialist.