Hidden pain inside the heart is caused by insufficient blood supply to the coronary arteries or inflammation of the heart and neighboring organs and tissues. Common in extreme fatigue, angina pectoris, coronary heart disease, myocarditis, pericarditis, pleurisy and chronic cholecystitis and other diseases. 1. Inadequate blood supply to coronary arteries: Decreased left ventricular ejection during extreme fatigue, angina pectoris and coronary artery spasm or blockage during coronary artery disease, chronic cholecystitis and gallbladder syndrome, etc. can lead to insufficient supply of coronary arteries, and transient episodes of retrosternal pain may occur. 2. Inflammation of the heart and neighboring organs and tissues: myocarditis, pericarditis and pleurisy and other diseases produce inflammatory mediators that stimulate the wall layer of the pericardium to cause pain. Hidden pain inside the heart, it is recommended to go to the hospital in time, follow the doctor’s instructions standardized diagnosis and treatment.