Elderly people may have difficulty lying down with coronary heart disease, arrhythmia, respiratory diseases and so on. 1. Coronary heart disease: the elderly are prone to atherosclerosis, resulting in narrowing of the coronary arteries, the myocardial blood supply is insufficient, if the onset of the night, there will be lying down in the mouth of the heart difficult situation. 2. Arrhythmia: the elderly have hypertension and other diseases, when the blood pressure control is not good, leading to cardiac hypertrophy or heart failure. If the onset of sleep, easy to appear atrial arrhythmia, atrial tachycardia, atrial flutter or even atrial fibrillation, will lead to symptoms of dysrhythmia. 3. Respiratory diseases: bronchial dilatation or chronic obstructive pulmonary disease, due to airway mucosal congestion, secretion increase, position change reason, easy to appear chest tightness, shortness of breath. The elderly lying down when the heart is difficult, it is recommended to consult a doctor in a timely manner, comply with medical advice for further examination, with the help of the doctor to clarify the cause, and targeted treatment or treatment.