Hyperthyroidism may cause chest tightness and shortness of breath. The elevated level of thyroid hormone in hyperthyroidism will lead to high metabolic state, high metabolic state of cardiac excitability increases, myocardial contractility increases, heart rate increases, peripheral vascular resistance decreases, cardiac efflux increases, myocardial oxygen consumption increases, when the above pathology progresses, it can induce hyperthyroidism heart disease, appearing in the series of symptoms, such as tachycardia, chest tightness, fatigue, shortness of breath and so on. Patients with hyperthyroidism who have symptoms such as chest tightness and shortness of breath may consider perfecting ECG, X-ray and ultrasound examination of the heart to observe whether they are accompanied by hyperthyroid heart disease. Patients with hyperthyroidism who experience chest tightness and shortness of breath are advised to go to the hospital and ask the doctor to make a judgment.