Chest congestion and chest tightness may be related to coronary heart disease, heart failure, lung disease, pleural effusion, etc. 1. Coronary heart disease: when the coronary arteries are narrowed or blocked, the blood supply to the myocardium is seriously insufficient, resulting in myocardial ischemia or even myocardial necrosis, and the symptoms of tightness and congestion in the anterior region of the heart appear. 2. Heart failure: when heart failure occurs, myocardial contractility decreases, cardiac output decreases and blood pools in the lungs, leading to insufficient gas exchange in the lungs and symptoms of chest congestion and tightness. 3. Lung disease: If pulmonary embolism occurs, it will lead to gas exchange dysfunction in the lungs, resulting in severe chest congestion and chest tightness. 4. Pleural effusion: such as pneumonia or lung cancer can lead to pleural effusion, chest tightness, chest congestion, dyspnea and other symptoms. If symptoms of chest congestion and chest tightness occur, it is recommended to go to regular hospitals immediately for comprehensive examination and active treatment.