Staying up late has certain harmful effects on the body, but the degree of harm to the body will vary depending on the individual’s physique. First of all, staying up late can cause disorders in the endocrine system of the human body, and disorders in the endocrine system can easily cause hormone secretion disorders, resulting in the endocrine system to secrete too much or too little hormone, and the human body will often appear obese, depressed, loss of appetite and other symptoms. Secondly, because of staying up late to make the human body functions can not get normal rest, the human body functions work slowly, easy to cause work, study and other aspects of inefficiency. In addition, staying up late will also cause the body’s appetite, resulting in the body’s desire for food intake rose, but because the rest time is not enough, the digestive system digestion is slower, so it is easy to lead to indigestion, intestinal insufficiency and other hazards, a long time will lead to gastrointestinal diseases.