Differential Diagnosis for Dry Mouth in the Morning
- Single Most Likely Diagnosis
- Dehydration: This is often the most common cause of dry mouth, especially in the morning. It can be due to not drinking enough water during the day or night, leading to a decrease in saliva production.
- Other Likely Diagnoses
- Sleep with mouth open: Sleeping with the mouth open can cause dry mouth due to evaporation of saliva.
- Medication side effects: Many medications, such as antihistamines, decongestants, and antidepressants, can cause dry mouth as a side effect.
- Mouth breathing: Breathing through the mouth instead of the nose can dry out the mouth and throat.
- Aging: Older adults may experience a decrease in saliva production, leading to dry mouth.
- Do Not Miss Diagnoses
- Sjögren's syndrome: An autoimmune disorder that can cause dry mouth and eyes.
- Diabetes: Uncontrolled diabetes can cause dry mouth due to high blood sugar levels.
- Hypothyroidism: An underactive thyroid gland can cause dry mouth, among other symptoms.
- Sleep apnea: This condition can cause mouth breathing and dry mouth.
- Rare Diagnoses
- Sarcoidosis: A rare autoimmune disorder that can cause dry mouth, among other symptoms.
- Amyloidosis: A rare condition that can cause dry mouth, among other symptoms.
- Radiation therapy: Radiation to the head and neck can cause dry mouth due to damage to the salivary glands.