The common angina sites are as follows: 1. The typical angina pain site is behind the sternum, that is, behind the middle and lower sternum, but some patients also show the precordial area; 2. Angina attacks can radiate to the precordial area, and can also radiate to the left shoulder, the left suprascapular area, or even the inner side of the left upper limb, including the ring finger and little finger; 3. Some angina attacks can radiate to the jaw, the neck or the throat, and some Some angina attacks can radiate to the jaw, neck or throat, and some even have toothache; 4. Some angina attacks are bilateral shoulder pain or bilateral arm pain, or even right chest pain. Therefore, patients with chest pain should go to the hospital promptly and decide whether it is angina through the doctor’s evaluation and relevant auxiliary tests. Because the pain sensation of angina is caused by a nerve reflex, the nerves innervating the heart and the nerves innervating the neck and the thoracic and abdominal organs partly overlap, so some of the angina attacks may involve the upper limbs. The ulnar side of the upper extremity may appear similar to biliary heart syndrome and gastric heart syndrome. In some cases, it may even go to the upper abdomen and cause stomach discomfort. Angina attacks are mainly of short duration in the early stages, with or without trigger attacks, and will be relieved more quickly with a few minutes of rest or with medication. If the pain is in other organs, such as the stomach or shoulder and neck, it will be persistent and will not recover for a few minutes. If the attack is particularly short, and the symptoms are severe, with panic, fear or sweating, the first thing to consider is an angina attack. You should go to the hospital promptly and have your doctor assess whether the chest pain is cardiogenic or caused by some other organ disease, whether it is dangerous and the degree of danger, and seek medical attention promptly if you have these symptoms.