Wake up in the middle of the night fast heart rate, a moment to recover, the normal heart rate of 60 to 100 beats per minute, physiological heart rate, do not worry, pay attention to rest, pathologic such as infection, need timely treatment. 1. Physiological: waking up in the middle of the night with a fast heartbeat, due to the recent mental stress or excessive thinking about something during the day, strenuous exercise, in the middle of the night are prone to wake up with a fast heartbeat, and then recovered, is a normal phenomenon, do not worry. Usually should be regular work and rest, more rest, avoid drinking more water before going to bed, to ensure the quality of sleep. 2. Pathological: If it is pathological, you need to go to the hospital to do electrocardiogram, such as infection, high fever and arrhythmia are easy to cause rapid heartbeat, it is recommended to go to the regular hospital to find out the cause of the disease in time, symptomatic treatment. If you feel unwell, you should go to the hospital in time, and under the guidance of the physician, give targeted treatment after clarifying the cause.