Sleeping hungry has the following disadvantages: 1. It will increase the risk of hypoglycemia, especially for patients with diabetes, such as fasting to bed will cause the emergence of the dawn phenomenon, which is a sudden reflex increase in blood sugar in the morning. The reason is that sleeping on an empty stomach will promote the decomposition of glucose, which will lead to nighttime hypoglycemia and, in severe cases, hypoglycemic coma. 2. Sleeping hungry will cause excessive acid reflux, which is particularly detrimental to patients with a history of gastric disease and will lead to gastroduodenal bulb ulcers, gastric mucosal erosion and excessive acid reflux, causing atrophic gastritis and reflux gastritis. 3. 3, long-term hunger to sleep will cause plant nervous disorders, resulting in poor sleep quality and cause insomnia, dreaming, palpitations and other situations.