A heart rate of 90 beats per minute is within the normal range. If the heart rate is in a newborn or child, during exercise or emotional excitement, no special treatment is usually needed; if it is in an adult at rest, the cause needs to be clarified and the patient’s health condition determined whether control is needed. Normal human heart rate ranges from 60-100 beats per minute and can vary depending on age, gender or other physiologic factors. In a quiet state, the ideal heart rate for adults should be 55-70 beats per minute. If the heart rate reaches 90 beats/minute during emotional or athletic symptoms, no special treatment is usually needed. If the heart rate is around 90 beats/minute at rest, the reason for the heart rate of around 90 beats/minute needs to be clarified. Common causes of a heart rate of 90 beats/minute at rest are smoking, alcohol stimulation, and irritability. For adults, it is also important to determine if the heart rate is increased in sinus and to see if there are any changes in the electrocardiogram. If there is no arrhythmia, etc., it is necessary to determine whether there is a problem with thyroid function, or whether there is a factor of anemia, as well as rest, poor sleep, and other factors that affect the heart rate. In the case of patients with high blood pressure or heart disease, a resting heart rate of around 90 beats per minute is usually needed to be controlled. In daily life, it is important to abstain from smoking and alcohol, and to refrain from arrogance and impatience. When emotionally stimulated, you can take deep breaths or divert your attention, such as reading or listening to music, to relieve the rapid heart rate. If it is suspected that their heart rate is too fast patients, it is recommended to go to the regular hospital to improve the relevant examination, patients should not self-diagnosis and treatment in order to avoid delaying the condition.