Most patients do not have precursor symptoms when sudden death from staying up all night occurs, and some patients will have precursor symptoms such as chest pain, fatigue, shortness of breath, unexplained fainting, and palpitations. Sudden death refers to the sudden, non-violent death of a person who is healthy in appearance or who is not expected to die because of a late night. Due to individual differences, the precursor symptoms of sudden death after staying up all night are likely to be different. Some patients do not have obvious symptoms before sudden death, and suddenly they will have loss of consciousness, or accompanied by generalized convulsions, incontinence, apnea, dilated pupils and other symptoms. There are also some patients in the late-night sudden death days or months before, often appear body fatigue, palpitations, shortness of breath, breathlessness, chest tightness and pain, unexplained dizziness and other precursor symptoms, and even some patients will be frequent loss of consciousness, coma phenomenon. Once a person is found to have died suddenly, he or she should follow the instructions of a professional doctor, carry out effective cardiopulmonary resuscitation (CPR) and electrical resuscitation in a timely manner, and be transported to a hospital for treatment in a timely manner.