Many heart diseases or diseases outside the heart can make young people often suffer from chest tightness and shortness of breath. It is recommended to go to the hospital as soon as possible to identify the causes of chest tightness and shortness of breath. In young patients, common heart diseases that can cause chest tightness and shortness of breath include hypertrophic cardiomyopathy, dilated cardiomyopathy, acute pericardial tamponade, myocarditis, etc. Others, such as hyperthyroid cardiomyopathy, severe anemia, can also have the above uncomfortable symptoms. Therefore, we should go to the hospital as soon as possible to identify the cause and treat it. Otherwise, if it is not treated in time, it may lead to continuous deterioration of cardiac function, the occurrence and development of cardiac insufficiency, and even the risk of sudden death or cardiac arrest.