Often stay up late may be sudden death, especially with cardiovascular disease patients. Often staying up late may lead to sudden death. Often staying up late will disrupt the biological clock of the human body, make the nervous system dysfunction, cardiac arrhythmia, enhanced myocardial contraction, and even trigger ventricular tachycardia and ventricular fibrillation, which will lead to sudden death of the patient. If you suffer from cardiovascular diseases yourself, such as coronary heart disease, heart failure, etc., staying up late often will increase the risk of sudden death. Often stay up late is a bad habit, there are many harmful effects on the human body, such as easy to cause dry eye, retinitis and other eye diseases, but also metabolic dysfunction, high blood pressure, high blood sugar and other diseases, often stay up late will have a great impact on human health. In life to develop healthy habits, avoid staying up late, to ensure enough sleep, to reduce the occurrence of disease, if often stay up late body discomfort, should be timely to the hospital, clear cause of the symptomatic treatment.