A heart rate of about 90 beats/min is a normal heart rate, and usually does not need to go to the hospital to see a doctor, if there is any other obvious discomfort, then we should seek medical attention in a timely manner. Normal adults in a quiet state, the heart rate of 60-100 beats / min, if > 100 beats / min, it is tachycardia; if < 60 beats / min, it is bradycardia. Therefore, the heart rate of about 90 beats / min is a normal heart rate range, if the body does not have other uncomfortable symptoms, there is no need to see a doctor; if there is panic, shortness of breath, dyspnea, or chest pain, chest tightness and other physical discomfort, we should consult a doctor in a timely manner, to find out the cause of the disease, and then comply with the doctor's instructions for treatment. Of course, even if the heart rate exceeds 100 beats per minute, if it is in the emotional excitement, after a tiring exercise or after a full meal, after drinking alcohol or citing coffee, strong tea, there is no need for special treatment, after resting the heart rate will return to normal.