The common cause of lying down breathlessness may be bronchial asthma attack or cardiac insufficiency, according to the specific cause of the targeted treatment. 1. Bronchial asthma: during a bronchial asthma attack, the patient often can not lie down, lying down will aggravate the symptoms of dyspnea, in this case should sit up in time, and the use of bronchodilators, such as albuterol, terbutaline and so on. 2. cardiac insufficiency: often caused by lying breathless cardiac insufficiency for acute left heart failure, this time a large amount of blood in the lung tissue, resulting in pulmonary edema, symptoms of wheezing aggravated, sweating, can not lie down, this cause of breathlessness first need to be directed at the primary treatment, can be used in a timely manner diuretics, such as furosemide, to reduce the cardiac load, and so on. Lying on the ground can also have other causes, such as pulmonary embolism and other diseases, mostly suggesting that the condition is more serious, should be timely medical care, clear diagnosis, symptomatic treatment. All of the above drugs need to be used under medical supervision.