A heart rate of over 90 beats per minute alone does not indicate a problem. It is necessary to take into account the past, the presence of accompanying symptoms, and other tests to determine whether there is a problem and what the problem is. In adults, the normal heart rate is 60-100 beats/minute in a quiet state, so a heart rate of 90+ beats/minute is within the normal range. If the heart rate fluctuates at a lower level of 60-70 beats/minute in the past and rises to more than 90 beats/minute, although it is also within the normal range, the increase in heart rate from the base may be related to emotional excitement, exercise, fatigue, drinking alcohol or strong tea and coffee, which is a physiological increase in the heart rate, and it can be rested and adjusted to return to normal without treatment. Elevated heart rate of more than 90 times/minute may also be seen in fever, hyperthyroidism, anemia and other diseases, need to improve the examination and treatment of the primary disease. If the heart rate keeps fluctuating at more than 90 times/minute and is accompanied by uncomfortable symptoms, other pathologic factors should be considered, and medical treatment should be sought and prescribed by the doctor. Therefore, for no obvious discomfort and long-term heart rate of more than 90 times / min of the population, it is recommended to increase daily exercise, avoid staying up late, such as obesity, reasonable weight control, is conducive to reducing the basal heart rate.