Staying up late may be prone to sudden death, especially for some middle-aged and elderly people or patients who usually have high blood pressure, diabetes, coronary heart disease or congenital heart disease. If you often stay up late, it may induce the aggravation of these diseases, which suddenly appear cardiac arrest, death. If young people often stay up late, the body burden is relatively large, there may also be frequent fatigue resulting in sudden cardiac arrest and death. In general, CPR must be performed immediately to avoid permanent damage to brain cells due to prolonged ischemia. If it takes more than 3-5 minutes for CPR to be started, it is possible that even after the heartbeat is restored, brain function cannot be resuscitated and the patient will remain in a coma for a long period of time. Sudden death has a very high mortality rate even if resuscitated in time.