Why does one lie down at night cough all the time

A lie down at night cough may be indoor dust, bed quilt is not clean and other reasons, may also be allergic pharyngitis, left heart failure, bronchitis and other diseases caused. If long-term lying down cough symptoms, it is recommended to go to the respiratory department for a detailed examination, if it is caused by disease to be treated in time, so as not to affect sleep.