Chronic obstructive pulmonary disease (COPD) is now considered by the Centers for Disease Control to be the fourth leading cause of death in the US.
The acronym, COPD, refers to 2 common breathing disorders: chronic bronchitis and emphysema.
Both conditions make it difficult to breathe during the day while you are awake.
At bedtime, COPD can create nearly impossible conditions for getting adequate sleep.
It can also worsen other preexisting (or undetected) sleep disorders.