If the heart beats faster in bed at night, the possible causes are as follows: 1. It should be clarified whether there are heart-related diseases, such as heart failure, congenital heart disease, heart valve disease, and various types of cardiomyopathies; 2. Whether there is severe anemia, hyperthyroidism and whether to drink alcohol, strong tea, coffee and other stimulating drinks before going to bed, all of which can lead to a faster heartbeat. The normal human heartbeat is 60-100 beats/min. If the heartbeat exceeds 100 beats/min, it is considered tachycardia. Tachycardia can cause patients to experience chest tightness, panic, shortness of breath and other uncomfortable feelings, so once this symptom occurs, you should go to the hospital promptly.