Chronic chest tightness does not necessarily mean coronary heart disease. Coronary heart disease has the symptom of chest tightness, but long-term chest tightness does not necessarily mean that coronary heart disease exists. Long-term chest tightness suggests that there may be respiratory disease or cardiovascular disease. Coronary heart disease patients when angina attack can appear chest tightness symptoms, when long-term chest tightness, suggesting the possible existence of coronary heart disease due to heart failure, but long-term chest tightness is not necessarily due to coronary heart disease. There are many possible causes of long-term chest tightness, such as when there is pleural effusion, there can be long-term chest tightness symptoms; interstitial pneumonia, emphysema and other lung diseases can also appear long-term chest tightness symptoms; a variety of cardiovascular diseases leading to heart failure can occur in different degrees of dyspnea, can also be manifested as long-term chest tightness. For long-term chest tightness patients need to go to the hospital in time for further examination to clarify the cause of the disease, so as not to delay treatment.