There are still more reasons for the symptoms of difficulty in breathing in sleep, there are the following: 1. There may be inflammation of the respiratory system. When people sleep, most of them are in a lying down state, the bronchial tree will also become horizontal, and the inflammatory substances collected in the bronchi are less easy to discharge, which will stimulate the bronchi causing the phenomenon of tracheospasm, so there will be breathing difficulties. Nebulized inhalation of bronchodilators is needed for treatment. Salbutamol and terbutaline sulfate can be nebulized and inhaled, and need to be used together with glucocorticoids for better results. If the effect of nebulized inhalation is not good, you can take oral or intravenous drip bronchodilators for treatment. 2, at bedtime, bronchial smooth muscle will spasm, also may be due to the excitatory effect of the vagus nerve, chew one chewable tablet of montelukast sodium before going to bed, can also prevent the appearance of breathing difficulties in bed.