A pulse rate of 100 beats/minute or more is considered tachycardia, which can be characterized by shortness of breath, flushing, profuse sweating, and a consciously audible heartbeat. Normal pulse range is 60~100 beats/min, over 100 beats/min belongs to tachycardia, which is divided into physiological and pathological tachycardia. 1. Physiological tachycardia: it can be seen in normal people smoking, drinking tea or coffee, drinking alcohol, physical labor or emotional excitement, the patient can obviously determine their own heartbeat acceleration triggers, the pulse rate of 100 beats / min or more, you need to remove these possible triggers in time, and calm the mood, or exercise more than 100 beats / min is a normal phenomenon. 2. Pathological tachycardia: Possible diseases include hyperthyroidism, anemia, myocardial ischemia. It can also be caused by the oral administration of drugs that can cause a rapid pulse, such as adrenaline, dopamine, meso hydroxylamine and so on. Symptoms include shortness of breath, flushing, and profuse sweating. Patients need to consult the doctor in time, hospitalization, routine electrocardiogram or 24-hour dynamic electrocardiogram, diagnosis is clear to deal with the cause. If the pulse rate is more than 100 beats per minute, the patient needs to clarify whether there are obvious triggers, and if the pulse rate does not decrease when the triggers are removed, or if there is any discomfort, the patient needs to consult a doctor promptly.