If your mouth feels dry at night, it can be caused by dehydration, medications, or breathing through your mouth due to a blocked nose or allergies. Other reasons include underlying health conditions like diabetes or Sjögren’s syndrome, cancer treatments, anxiety, and lifestyle factors such as smoking or excessive alcohol/caffeine consumption.Â
Common causes
- Dehydration:Â Not drinking enough water throughout the day can lead to a dry mouth.
- Medications:Â Many prescription and over-the-counter drugs, including some for blood pressure, allergies, anxiety, and depression, have dry mouth as a side effect.
- Mouth breathing:Â This can occur if you have a stuffy nose from allergies, a cold, or other nasal congestion.
- Underlying health conditions: Certain conditions like diabetes, Sjögren’s syndrome (an autoimmune disease), and sleep apnea are associated with reduced saliva production.
- Cancer treatments:Â Radiation therapy to the head and neck, or chemotherapy, can damage salivary glands.
- Lifestyle habits:Â Smoking, chewing tobacco, and consuming too much alcohol or caffeine can contribute to dryness.
- Aging:Â Saliva production naturally decreases as we age, making older adults more susceptible to dry mouth.
- Nerve damage:Â Damage to the nerves in the head and neck, often from an injury or stroke, can affect salivary glands.Â
