If a patient occasionally has a vague pain in the precordial region, the common causes are as follows: 1. This condition should be ruled out whether it is organic heart disease, such as whether it is caused by such problems as aortic stenosis, hypertrophic obstructive cardiomyopathy, coronary artery disease, angina pectoris. 2. In addition, it can be further ruled out that it is not caused by heart disease itself, such as pulmonary occupancy. 3. There are also patients who are not suffering from any disease, but from psychological factors, such as anxiety and cardiac neurosis, who tend to suffer from discomfort that is relieved after activity or distraction.