The chance of sudden death can be greatly increased by staying up late, and there are certain signs when staying up late, as follows: 1, the performance of the patient feels very tired after staying up late, no energy or even a trance. 2, the patient’s underlying disease aggravated, such as myocardial ischemia, angina and other patients will continue to have heart attacks, some are caused by malignant arrhythmias, etc., after staying up late for a long time will appear palpitations, shortness of breath. 3, after staying up late can also make the lung disease aggravated including asthma and other attacks frequently, and symptoms gradually aggravated, which are signs before sudden death, in this case should be promptly to the hospital for examination, can be timely rescue to save the lives of patients.