Generally speaking, once in a while, sleeping late is not very harmful to the body, but may lead to poor mental health during the day. But if you sleep late for a long time, but the impact on the body is greater. At the same time, there are differences in each person. Different degrees of late sleep will make the body gastrointestinal diseases, skin condition, fat and resistance to decline and other hazards: 1, poor mental state: for most people, late sleep will lead to poor mental state, distraction and emotional anxiety and other phenomena; 2, gastrointestinal diseases: late sleep will cause increased secretion of stomach acid at night, so long-term late sleep, it is easy to induce a variety of gastrointestinal diseases 3, poor skin condition: prolonged late sleep is likely to lead to poor skin elasticity, lack of luster and roughness; 4, fat: for patients who sleep late for a long time, prone to hunger at night, thus ingesting a lot of food, long-term will lead to fat patients, serious cases will even appear blood lipids, blood sugar and other abnormalities; 5. Resistance decline: long time to sleep late, do not get enough sleep, easy to cause the body’s immune system damage phenomenon, there will be easy to catch a cold, easy to be infected and other situations. Overall, sleeping late will have a variety of bad effects on the body, it is recommended that patients do not sleep late or even stay up late for a long time, to develop a reasonable work and rest planning.