Staying up late may cause the human body to become fat, staying up late may cause the human body to develop endocrine disorders, endocrine disorders may lead to abnormal secretion of hormones in the human body, often causing the human body to overproduce certain hormones, resulting in the appearance of the human body to become fat. Staying up late can cause the human intestinal tract disorder, causing the human body to secrete too much stomach acid, which causes the human appetite to rise, thus increasing the amount of food intake, thus increasing the amount of heat in the human body, causing the human body to gain weight. Staying up late will also affect the metabolic rate of the human body, resulting in the slow metabolic rate of the human body, the slow metabolic force of the human body can easily lead to part of the toxins and calories in the human body can not be eliminated, resulting in the accumulation of toxins and calories in the human body caused by bloated obesity, staying up late may cause the human body to gain weight.