Overnight work or recreation is not recommended as it is not usually associated with sudden death, but people who have cardiovascular disease or who are unable to cope with the stimulus are at risk of sudden death. Sudden death is the sudden death of a healthy or seemingly healthy person within a short period of time due to a disease, of which sudden cardiac death is the most common. Sudden death is unpredictable, so there is no way to tell exactly when it will happen, but that doesn’t mean it is completely unpredictable. The risk of sudden death is increased when there is a long history of a poor lifestyle (frequent late nights and all-nighters). An occasional all-nighter does not usually result in sudden death, but because the nervous system will be in a state of hyperactivity for a long time, it is likely to cause different degrees of failure of the body’s organs in a short period of time, so when one already has a heart problem, he or she is very likely to die suddenly because of the stress on the heart. In addition to the impact of overnight on the heart, but also affect the body’s normal biorhythm, disrupting the normal biological clock, which leads to a decline in the body’s immunity, bringing a series of health problems, so it is best not to overnight. Therefore, if there is no heart problem before, overnight one day will not cause sudden death. However, if there is a long history of irregular work and rest, or if there are already existing health problems, a one-day overnight stay is likely to be the last straw that breaks the camel’s back. It is recommended to cultivate a good lifestyle and follow a regular schedule to avoid sudden death.