Best dental clinic in Adambakkam | Is Your Mouth Dry at Night? Causes and Solutions Waking up with a dry mouth at night is more common than you think, and ignoring it can affect your oral health. Dry mouth, or xerostomia, occurs when your salivary glands don’t produce enough saliva, leading to bad breath, cavities, and discomfort. Common causes include mouth breathing, dehydration, certain medications, snoring, and conditions like sleep apnea. At Dr. Akkshaya Dental & Aesthetics, we identify the root cause and offer tailored solutions — from hydration tips and lifestyle changes to saliva-boosting treatments. Managing nighttime dry mouth early can protect your teeth, gums, and overall oral health.