It is generally possible to eat sweet potatoes at night. Sweet potatoes contain a large amount of carbohydrates, dietary fiber, vitamin C, carotene and other substances, which can replenish the nutrients needed by the human body and maintain normal physiological functions. Its taste is slightly sweet, which can increase one’s appetite, as well as satiety. Therefore, it is generally possible to eat sweet potatoes at night. As it contains a large amount of dietary fiber, it can promote intestinal peristalsis and help constipated patients defecate. However, because it contains sugar, carbohydrates, large amounts of use can make blood sugar appear to increase. Diabetic patients are not recommended to use too much, which is not conducive to the control of the disease.