This situation is usually related to arrhythmia or daytime fatigue. First of all, arrhythmia will appear when sleeping due to the heart beating rhythm inconsistency and insufficient blood supply, which will lead to palpitations and waking up, accompanied by accelerated heartbeat, cold sweat and other manifestations. It is recommended to do electrocardiograms to confirm the cause of arrhythmia, and then treat the symptoms, so as to avoid ischemia during the night and cause myocardial infarction and other serious cardiac disorders. The second cause of rapid heartbeat is that the mental stress or overwork during the daytime makes the parasympathetic nerves too excited at night, which leads to sleeplessness and waking up at night, etc. It is recommended that patients keep a good mindset, do not put too much pressure on themselves, and do outdoor exercise more often.