Heart discomfort should be vigilant, this phenomenon is related to heart disease, such as angina pectoris, arrhythmia, heart attack. 1. Angina pectoris: this is a manifestation of myocardial ischemia and ischemia, pain in the anterior region of the heart, a feeling of suffocation, which can be radiated to the left upper limb, the duration of a short time, usually 3 to 5 minutes, rarely more than 15 minutes, need to be relieved by nitroglycerin, and it is recommended to actively consult a doctor for examination and treatment. 2. Arrhythmia: the rhythm of the heart will be abnormal, need to carry out electrocardiogram to clarify the diagnosis, should use anti-arrhythmic drugs, such as propranolol, amiodarone and so on. 3. Heart attack: patients will be caused by acute myocardial ischemia and ischemia and myocardial necrosis, the main symptoms are severe chest pain, shock and other manifestations, containing nitroglycerin did not have significant relief, the need for timely emergency thrombolytic therapy. It is recommended that patients with heart discomfort should seek medical attention in a timely manner, do not blindly use drugs to delay the condition, so as to avoid life-threatening.