The reason why the heart feels like a tendon is tugging at the pain of not daring to take a deep breath includes physiological factors and hyperthyroidism, coronary heart disease and other disease factors, the treatment of the disease includes medication and surgical treatment. 1. physiological factors: if the heartbeat is accelerated after strenuous exercise, the coronary artery contraction can trigger the phenomenon of the heart tugging pain not dare to take a deep breath, at this time do not need special treatment, can be relieved after rest. 2. Hyperthyroidism: If hyperthyroidism triggers a rapid heartbeat, the heart pulling pain dare not take a deep breath, at this time you can give propylthiouracil and other drugs anti-hyperthyroidism treatment. 3. Coronary heart disease: for patients with coronary artery stenosis, you can give nitroglycerin and other drugs to expand the coronary artery treatment, if necessary, you can give interventional surgery. Finally, the heart feels a tendon tugging pain dare not take a deep breath of the phenomenon, please consult a doctor in a timely manner, all of the above drugs please follow the doctor’s instructions.