If you use a continuous positive airway pressure (CPAP) machine for obstructive sleep apnea (OSA), you may breathe better at night. But you may also have dry mouth in the morning. Dry mouth is a ...

Research suggests that CPAP may improve headaches in some people with sleep apnea. But some people may develop headaches if their CPAP mask is too tight, if they develop nasal congestion, or if CPAP ...