1. What Is Dry Mouth During CPAP Therapy? Dry mouth, medically known as xerostomia , is a common complaint among CPAP users—especially those who use nasal masks or tend to breathe through their mouths while sleeping. CPAP machines provide continuous airflow to keep the airways open during sleep, which is essential for treating obstructive sleep apnea (OSA). However, this constant airflow can dry out the mouth, tongue, and throat, especially if there’s any mouth leakage or improper humidification. Patients often describe the feeling as waking up with a dry, sticky mouth , cracked lips, or even a sore throat. While not dangerous, dry mouth can lower CPAP compliance and affect your sleep quality significantly. 2. Why Does CPAP Cause Dry Mouth? Common Reasons Explained Several underlying reasons can lead to dry mouth while using CPAP: Mouth Breathing: If you're using a nasal or pillow mask and sleep with your mouth open, airflow escapes through the mouth, causing dryness. ...
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