Normal heart rate ranges from 60 to 100 beats/minute. However, a heart rate above 90 beats/minute often causes palpitations and other discomforts, at which time it should be clarified whether there is a primary disease. If there is no other disease, there is no harm in this range of heart rate; if the patient has other diseases with increased heart rate, it may aggravate heart failure, increase the burden on the myocardium, and is an important independent risk factor for cardiovascular disease. 1. No other diseases, may be caused by exercise, fatigue or emotional fluctuations caused by the heart rate is greater than 90 times / min, at this time there is no harm, do not need special treatment, will not cause damage to the body. 2. If the patient suffers from other diseases: if the heart rate is greater than 90 beats / min caused by heart failure, long time this rhythm will aggravate heart failure. If the heart rate is greater than 90 beats per minute due to hyperthyroidism, this heart rate will cause hyperthyroidism heart disease in a long time. If the heart rate is greater than 90 beats per minute due to coronary artery disease, it is easy to cause myocardial ischemia. If the heart rate is too high for a long period of time, you should go to the hospital in time for treatment under the guidance of a professional doctor.