Staying up late will make you fat, in the process of staying up late many people will eat late night snacks, so stay up late eating snacks will be very much. After eating three meals a day during the day, more food is consumed because of staying up late, resulting in more energy entering the body, which causes excess energy to be stored in the form of fat, resulting in an increased risk of obesity. In the process of staying up late, there is a very big damage to insulin, which plays a very important role in the process of sugar and energy metabolism. So many people in the process of staying up late will have a very bad impact on the function of the islet, the islet function will be reduced so that the blood sugar is high and low, and then more easily stored in the form of fat, resulting in increased risk of gaining weight. From the point of view of Chinese medicine, staying up all night will have a great loss of Yang Qi, especially the spleen and stomach Yang Qi plays a very important role in the food transportation function. Because staying up late reduces the spleen and stomach Yang Qi, the ability to transport and transform food decreases, making it easier for food to accumulate in the body and cause fat gain.