HR is the abbreviation of heart rate. High HR means rapid heart rate, normal human heart rate is 60-100 beats/minute, more than 100 beats/minute is tachycardia. The causes of tachycardia are divided into physiological and pathological, physiological common in anxiety, staying up late, emotional excitement, drinking strong tea, coffee, alcohol, etc.. Pathological causes include fever, hyperthyroidism, anemia, etc. Therefore, further treatment is needed according to the different causes. In physiological cases, no medication is needed if there is no organic disease; in pathological cases, the primary cause of the fever should be clarified; in patients with hyperthyroidism, anti-thyroid medication should be taken; in patients with anemia, anemia should be improved.