Fatty liver and stay up late has a certain relationship, if long-term stay up late is easy to cause liver ischemia, lack of oxygen, because long-term stay up late so that the liver does not get rest, liver metabolic function will also decline, the metabolic function of fat will also decline, so fatty liver patients should pay attention to rest, do not stay up late, long-term stay up late may induce abnormal liver function. Usually, you should develop good sleeping habits and do proper physical exercise, which is helpful to improve the metabolism of blood lipids in the liver. Regular check-ups of liver function, blood lipids, blood sugar and liver imaging should be done, and if liver function is abnormal, we should pay attention to rest and ensure sufficient sleep to improve liver function.