So if you sometimes fell like vomiting stomach juices getting up into your airway passage or can hear a liquid acid in the back of your throat crackling when you open your mouth you should tell your doctor. Anonymous i have had my cpap 2 machine now for a month and i m now getting a cough with mucus build up in back of my throat. Is There A Cure For Sleep Apnea With Images What Causes Sleep Cough variant asthma gastro oesophageal reflux and upper airway cough syndrome. Sleep apnea and coughing . Obstructive sleep apnea osa is a known risk factor for gerd which can also cause chronic coughing. The impact of continuous positive airway pressure cpap therapy and the mechanism of this association are not well understood. Sleep apnea evaluation is probably indicated according to new article in journal cough. If you wake up with a very dry mouth and gummy front teeth it may also be a sign of sleep apnea shives says my. Sleep apnea is a dangerous condition to have. Obstructive sle...