Difficulty in heart may be caused by coronary heart disease, anxiety and depression, heart failure and other reasons. 1. Coronary heart disease: dyscardia in patients with coronary heart disease is usually caused by myocardial ischemia and hypoxia due to coronary artery stenosis. At this time, in addition to the symptoms of dyscardia, most of them will be accompanied by pain in the precordial area and chest tightness. 2. Anxiety and depression: depressed patients usually have tension, restlessness, fear and impatience, and are prone to rapid heart rate and elevated blood pressure. It may also increase the burden on the heart, and some patients may experience cardiac distress. 3. Heart failure: Patients with heart failure suffer from insufficient blood supply to blood vessels, organs and organs throughout the body due to insufficient cardiac output of the heart, which leads to dyscrasia. It is recommended to consult a doctor for relevant examinations in time, and according to the specific situation, under the guidance of the doctor, carry out symptomatic treatment.