Normal adult pulse (heart rate) is 60-100 beats per minute, pulse 140 beats per minute is out of the normal range, belongs to the pulse is too fast, may be physiological reasons, may also be pathological reasons. 1. Physiological causes: Excessive drinking of alcohol and tea in daily life, strenuous exercise and other reasons can lead to a rapid pulse. Excessive intake of alcohol and caffeine can cause rapid pulse. Strenuous exercise can also cause rapid pulse. 2. Pathologic causes: Organic diseases of the heart and diseases outside the heart can cause rapid pulse. Commonly seen in various pathologic tachyarrhythmias, such as sinus tachycardia, atrial tachycardia, atrial fibrillation, atrial flutter and other diseases. Extracardiac disorders such as anemia can cause compensatory increase in heart rate. Hyperthyroidism is caused by an overproduction of thyroid hormones causing an increase in heart rate, which may sometimes reach 140 beats/minute. In conclusion, 140 beats/minute pulse is caused by physiological reasons without special treatment, but pathological reasons need to consult a doctor in a timely manner, to be evaluated by a professional doctor and then treated according to the cause.