A heartbeat of more than 100 beats per minute in the afternoon generally refers to a heartbeat of >100 beats per minute in the afternoon, which belongs to a state of tachycardia, which may be caused by physiological factors, or by pathological factors such as hyperthyroidism, anemia, or arrhythmia, while the heart rate range of normal people is 60-100 beats per minute. I. Physiological factors: If you often exercise in the afternoon, or emotional excitement, tension, or stimulated by the external environment, after drinking coffee, etc., will stimulate sympathetic excitement, so that the heart rate is > 100 beats/min in the afternoon, there are generally no other symptoms, this is a normal phenomenon, no special treatment is required. Pathological factors: 1. Hyperthyroidism: The thyroid gland synthesizes and releases too much thyroid hormone, resulting in hyper-metabolism and sympathetic excitation, which may cause a heartbeat of >100 beats/min in the afternoon, accompanied by proptosis, hypothermia, eyelid edema, vision loss and other symptoms; 2. Anemia: Due to a decrease in hemoglobin in the organism, resulting in insufficient tools to transport oxygen in the blood. Thus, tissue hypoxia occurs, the heart will deliver more blood to maintain the normal operation of the body, so the heart rate will appear compensatory acceleration, appear one to afternoon heartbeat > 100 beats/min, often accompanied by dizziness, weakness, pale face and other symptoms; 3, arrhythmia: such as sinus tachycardia, atrial tachycardia, atrial fibrillation, supraventricular tachycardia, ventricular tachycardia, etc., generally because the heart In order to increase the blood supply, the heart rate will be compensated to speed up, resulting in a heartbeat >100 beats/min in the afternoon, accompanied by dizziness, palpitations, hypotension and other symptoms; 4. Other factors: if the patient is infected with bacteria, viruses, etc., if the bacteria or viruses act on the heart, it may lead to damage to the heart muscle, and the patient may show a heartbeat >100 beats/min in the afternoon. The patient may show a heartbeat >100 beats/min in the afternoon, accompanied by fever and weakness. If the heart beats >100 beats/min in the afternoon and exceeds the normal range, after excluding physiological causes, it is recommended to go to the hospital for relevant examinations in a timely manner to clarify whether there is organic disease, and if necessary, oral antiarrhythmic drugs such as metoprolol, bisoprolol, etc. are needed to avoid serious consequences.