Nasal congestion alone doesn't cause obstructive sleep apnea, but it can definitely aggravate it
. If your palate and tongue structures are predisposed to
falling back easily due to
sleeping on your back and muscle relaxation in deep sleep, then having a stuffy nose can aggravate further collapse downstream. Untreated obstructive sleep apnea can lead to chronic fatigue, depression, anxiety, weight gain, high blood pressure, heart disease, heart attack and stroke.