The reasons for fast heartbeat and inability to sleep at night are as follows: 1, caused by arrhythmia, arrhythmia often appears in the state of tachycardia, is a manifestation of heart disease, will make patients appear panic, shortness of breath, uncomfortable and other symptoms can not sleep, should promptly go to the hospital for examination and treatment, in the hospital by doing electrocardiogram can be clearly determined, you can use certain drugs symptomatic treatment. 2, The heartbeat is fast at night and you can’t sleep, but it may be caused by shock and other stimulating factors, such as the patient is frightened or due to some things after excessive excitement, resulting in plant nerve disorders, sympathetic excitement, the heartbeat is fast and you can’t sleep. 3, the heartbeat is fast at night and you can’t sleep, perhaps due to physical weakness, anemia and low blood sugar and other reasons, should be examined through timely The symptomatic treatment can be significantly improved.