The appearance of the heart fossa stuffy blockage on the air, belong to the symptoms of chest tightness and shortness of breath, often seen in mental tension, stress, plateau reaction or in a confined space and other physiological conditions, after rest, relaxation, environmental changes can be alleviated. However, if it exists for a long time, it may also be due to some disease factors: 1, heart disease: angina pectoris will appear in the posterior sternum or precordial area with crushing pain, accompanied by a sense of suffocation, the patient may feel the heart fossa stuffy blocked on the air; myocardial infarction pain is more intense, accompanied by fear, near-death feeling; 2, respiratory system diseases: pulmonary embolism may appear sudden chest pain, serious may be accompanied by dyspnea, coughing blood Pulmonary infarction may cause sudden severe pain or colic in the chest, often accompanied by dyspnea or cyanosis, leading to stuffy breath in the heart; lung cancer may cause stuffy pain or cone pain in the chest, which may intensify when coughing or deep breathing, with the feeling of breathlessness and stuffy breath in the heart; 3, mediastinal diseases: mediastinal diseases such as mediastinal tumor may cause stuffy pain and stuffy breath in the heart. The chest pain caused by mediastinal tumor is persistent and gradually aggravated, and will appear or intensify when swallowing food; 4, other diseases: hyperventilation syndrome may cause a feeling of chest tightness and pressure or suffocation, and symptoms of chest tightness and blocked breathing; chest trauma due to external impact, plateau reaction, or certain psychological diseases such as neurosis and anxiety disorders may also cause a feeling of heart tightness and blocked breathing.