Angina pectoris is a relatively common disease, it will bring a lot of pain to patients, patients will have chest pain, chest tightness symptoms. Some patients fail to seek medical attention in time when symptoms appear, thus delaying the best time for treatment, and even life-threatening in serious cases! 1, what is angina sudden onset of chest pain, angina is a very important danger signal! When angina pectoris, the patient’s chest pain site in the anterior chest, that is, to the left anterior axillary line, the upper edge of the sternum to the upper abdomen as the boundary of the region. Patients with angina often describe chest pain as compressive, constricting, obstructive or suffocating, rather than true pain. However, the patient is afraid to continue moving, which is a common characteristic of angina patients. Angina attack is often three or five minutes, the time is short, the duration of more than half an hour, is relatively rare. 2, the cause of angina angina is a typical symptom of coronary heart disease. The underlying lesion is atherosclerotic fixed stenosis of coronary arteries. The principle of its attack is often due to the accelerated heart rate and increased myocardial oxygen consumption after activity, triggered by insufficient blood supply to the coronary arteries, which can generally be relieved after a few moments of rest. 3, angina danger Special reminder to patients with angina, angina is one of the signs of coronary heart disease danger, especially for patients with frequent attacks or severe degree. Once there is angina, it means that the condition is more serious, and should actively take the necessary preventive and control measures. Early detection of abnormalities and prevention of the risk of sudden onset of the condition. Angina is only one manifestation of coronary heart disease. If angina attacks become more frequent, the trigger becomes less and less obvious, the symptoms do not improve significantly after rest or medication, or the chest pain lasts for more than 15 minutes, it means that the patient’s condition has worsened again. If the patient is also accompanied by obvious symptoms of weakness, cold sweat, dizziness, weakness and unconsciousness, it may be a sign of myocardial infarction, and it is necessary to call the emergency number for help immediately. 4, the prevention of angina 1) drug self-help: people with coronary heart disease, to carry with them with nitroglycerin, isosorbide nitrate (cardiac pain), quick-acting heart pills and other drugs, at the beginning of the disease can be taken immediately to reduce the severity of the disease. 2) Treat hypertension, hyperlipidemia and diabetes; under the guidance of a doctor, use the medication reasonably and never stop it suddenly to avoid rebound and danger. (3) pay attention to improve the poor lifestyle, quit smoking and alcohol, maintain emotional stability, regulate the mood, relax the spirit, regular life, and ensure sleep. 5, angina do not always bear if frequent attacks of angina, must not always bear, must go to the hospital cardiology, need to assess the severity of the disease, and may need to improve the progress of dynamic electrocardiogram, coronary CTA or coronary angiography examination to clarify the location, nature and extent of the lesion, so as to more targeted treatment, to help you recover as soon as possible.