Patients who feel stuffy in the chest and feel something blocking them may be suffering from coronary artery disease or angina pectoris, while some patients may also be suffering from cardiac neurosis or anxiety. It is recommended that patients can take sublingual heart pills or compound Danshin drops when they are uncomfortable. If the symptoms can be relieved after taking the medication, it is highly considered to be related to insufficient blood supply to the heart muscle. Some patients may also suffer from aortic stenosis or hypertrophic obstructive cardiomyopathy, which may cause precordial discomfort; functional indigestion may also cause precordial discomfort.