What causes dry mouth and a parched tongue upon waking every morning?

Jun 19, 2024 Source: Cainiu Health
Disease description:

My father feels a dry mouth and tongue every morning upon waking. Could you please explain why this happens?

Doctor's answer (1)
Dr. He Haochen
Waking up with a dry mouth and throat every morning may be caused by several factors: 1. Breathing patterns during sleep: Breathing through the mouth instead of the nose at night can lead to evaporation of moisture in the oral cavity, resulting in dryness. 2. Environmental factors: Dry air in the bedroom, especially during winter when heating systems reduce indoor humidity, can cause dryness in the mouth and throat. 3. Inadequate fluid intake: Not drinking enough water before bedtime, or increased bodily demand for fluids during the night—such as in conditions like diabetes—can contribute to morning dry mouth. 4. Lifestyle habits: Consuming excessive spicy or salty foods or drinking alcohol in the evening may also lead to a dry mouth upon waking. To alleviate this symptom, it is recommended to maintain appropriate indoor humidity before bedtime, correct breathing patterns, increase fluid intake, and improve dietary habits. If symptoms persist or worsen, prompt medical evaluation is advised.