A dry throat can be caused by several factors including dehydration (not drinking enough water), breathing dry air or air-conditioned environments, sleeping with your mouth open, allergies, acid reflux, certain medications, and mouth breathing due to nasal congestion. Other causes include excessive talking, smoking, and chronic health conditions such as Sjögren’s syndrome or diabetes. Environmental factors like dry air, pollutants, and irritants can also contribute to a dry throat sensation. Drinking plenty of fluids, avoiding irritants, and using humidifiers can help relieve symptoms. If the dry throat persists for more than a week or is accompanied by other symptoms like difficulty swallowing, it is advisable to see a doctor for further assessment.