Late to bed and early to rise can cause sleep deprivation and harm health, staying up late can also seriously damage people’s health. Late to bed and early to rise has the following health effects: First, late to bed and early to rise will appear tired and weak, dizzy and dizzy, the symptoms of general discomfort, but also poor digestive function and lead to anorexia and other symptoms. At the same time, there will also be memory loss, poor academic performance and easy to make mistakes at work and other problems. Second, late to bed and early to rise will lead to chronic diseases such as hypertension, coronary heart disease, diabetes, etc., will also appear plant nerve disorders and brain neurasthenia and other diseases. Third, often stay up late will induce the risk of sudden death, a serious threat to people’s health.