The main causes of heart congestion include the following: 1. Insufficient blood supply to the heart in coronary artery disease, this kind of patients may previously have hypertension, diabetes and other underlying diseases, due to activities or emotional excitement and other reasons caused by heart congestion, examination of electrocardiogram and cardiac ultrasound can help clarify the diagnosis. 2. Heart failure, this kind of patients due to the reduction in the amount of blood shot from the heart to the aorta, causing tissue and organ ischemia and hypoxia, can also produce 3, lung diseases, the most common are chronic obstructive pulmonary disease, bronchial asthma, etc. These diseases affect the ventilation and ventilation function of the lungs, causing lack of oxygen in the body can also appear stuffy heart. 4, psychological factors, for anxiety, tension, mental stress can also appear stuffy heart, pay attention to exercise, regular work and rest, shift attention can help to improve.