Angina pectoris often occurs as a symptom of chest pain, and this chest pain occurs suddenly, the pain is difficult to describe, and is often easily triggered by exertion, physical activity, and mood swings, and this painful symptom will be relieved after taking nitroglycerin. Angina symptoms: chest pain The chest pain during an angina attack is rarely or not at all preceded by the patient, who can feel completely normal during the two attacks. Therefore, sudden onset of severe chest pain should not be taken lightly and is often an important sign of angina pectoris. During an angina attack, the patient’s chest pain is mostly in the left anterior chest, i.e., in the area bounded by the left anterior axillary line, upper dorsal border of the chest and upper abdomen. The most frequent site is behind the lower middle part of the sternum in the middle of the chest, often an area where the patient often has difficulty expressing the exact site of the pain, and if it is a very precise point of pain, it is unlikely to be angina. Angina pectoris is difficult to describe accurately During an angina attack, patients often describe a feeling of pressure, constriction, or obstructive suffocation in the chest, rather than true pain. However, the patient is afraid to continue moving, a common characteristic of patients with angina. If the chest pain can be moved or is instead relieved by activity, it is less like angina pectoris. Emotion or activity induced chest pain attack Labor, excitement, anger, excitement, cold, etc., may induce angina, especially after meals, cold climate or in windy weather still outside activities, more likely to make the chest pain attack. This is also one of the important features of angina pectoris. It is important to note that it is only when the chest pain occurs during activity that it may be angina, but if it is after a day of activity, exertion or returning home with chest tightness, it is less like angina. Angina symptoms: effective with nitroglycerin When angina attacks, sublingual nitroglycerin, for patients with coronary angina, has a significant therapeutic effect, generally 2-3 minutes after containing the drug, angina symptoms can be relieved, which is very important in the diagnosis of angina. This is very important in the diagnosis of angina pectoris. If it “works” only 1-2 hours after taking the drug, it may not be angina pectoris.