Tired heart discomfort may be related to heart disease, digestive system disease, respiratory system disease and so on. 1. Heart disease: such as angina pectoris, myocardial infarction, heart failure. Patients with angina and myocardial infarction cause coronary artery spasm or stenosis after activity, which manifests itself as cardiac discomfort. Heart failure patients after activity to reduce the amount of blood back to the heart, causing insufficient blood supply to the heart, can also be manifested as cardiac discomfort. 2. Digestive system diseases: for example, acute gastritis, acute attack of chronic colitis, acute cholecystitis, etc., after exertion may also reflexively cause heart discomfort symptoms. 3. Respiratory system diseases: for example, pneumonia, bronchial asthma, pulmonary embolism. Tiredness can also cause heart discomfort symptoms. Tired heart discomfort can be seen in a variety of causes, when the symptoms are obvious need to go to the hospital for further consultation, timely treatment, so as not to delay the condition.