Heart area distension may be related to angina pectoris, myocardial infarction, cardiac neurosis, pericarditis, myocarditis and other diseases, and there may be extracardiac causes of pain in the heart area, such as pleurisy, inflammation of the upper gastrointestinal tract and so on. 1. Angina pectoris: angina pectoris is mainly characterized by pain in the precordial region, and the nature of the pain is more complex, which may be distension, oppressive pain or boring pain, mostly transient episodes, which can be relieved by taking nitroglycerin. 2. Myocardial infarction: myocardial infarction is often sudden onset, early may be manifested as mild pain, may also appear distension, with the progression of the disease, there may be chest pressure-like pain, accompanied by profuse sweating, dyspnea and other symptoms. 3. Cardiac neurosis: If the pain in the heart area occurs uninterruptedly and the symptoms change with the change of mood, then the possibility of cardiac neurosis should be considered. 4. Pericarditis: patients may have fever, cough, sore throat or vomiting, diarrhea and other symptoms. If the pericardium exudes a large amount of fluid can occur acute pericardial tamponade symptoms, may appear chest pain, dyspnea, cyanosis, pallor, or even shock. 5. Myocarditis: viral myocarditis is the most common, the most common discomfort in most patients is palpitation, chest tightness, shortness of breath, feel the heart occasionally “stop” (premature beats, arrhythmia), exercise or excitement, the discomfort of the symptoms is obvious. In acute attacks, there may be moderate to severe fatigue, chest pain, dizziness and other manifestations. 6. Extracardiac causes: such as pleurisy, chest pain is the most common symptom, often occurring suddenly, the degree of which varies greatly, and can be unspecified discomfort or severe stabbing pain. There is also inflammation of the upper gastrointestinal tract, especially reflux esophagitis, with typical symptoms such as retrosternal burning (heartburn), reflux and chest pain. When there are signs of distension around the heart, it is important to seek medical attention to actively identify the cause of the condition and then treat the symptoms.