What causes dry mouth and throat during sleep at night?
Mar 18, 2025
Source: Cainiu Health
Dr. Liu Chao
Introduction
In general, dry mouth and throat during sleep at night may be caused by factors such as breathing patterns, nocturnal dehydration, environmental conditions, Sjögren's syndrome, diabetes, and others. Symptomatic management may involve general treatments, medication, and other approaches. In daily life, it is recommended to drink an appropriate amount of water before bedtime and adjust dietary habits, avoiding high-salt foods before dinner or bedtime.
Generally, dry mouth at night may be caused by factors such as breathing patterns, nocturnal dehydration, environmental conditions, Sjögren's syndrome, diabetes, and other reasons. Symptomatic treatments such as general care or medication may be needed. If experiencing any physical discomfort, prompt medical consultation is advised. Detailed explanations are as follows:
1. Breathing Pattern
When breathing through the mouth instead of the nose during sleep, the moisture in the mouth evaporates more easily, which may be accompanied by snoring, sore throat, or a dry throat upon waking in the morning. It is recommended to try improving sleeping posture or using nasal strips or nasal dilators to facilitate nasal breathing.
2. Nocturnal Dehydration
Although the body is at rest at night, it still requires water to maintain basic physiological functions. Prolonged lack of water intake can lead to reduced body water, causing dry mouth and possibly accompanied by symptoms such as dark-colored urine and decreased urine output. It is recommended to drink an appropriate amount of water after dinner, but avoid excessive water intake close to bedtime to prevent sleep disruption.
3. Environmental Factors
If the indoor air is excessively dry or the temperature is too high during sleep, body moisture may be lost through respiration and skin evaporation, leading to significant evaporation of moisture from the oral mucosa and tongue surface, resulting in dry mouth. It is recommended to use a humidifier to increase indoor air humidity and maintain moist air. Additionally, drinking an appropriate amount of water before bedtime may help alleviate symptoms.
4. Sjögren's Syndrome
Sjögren's syndrome is an autoimmune disease in which immune cells attack exocrine glands such as salivary glands, impairing their function and reducing saliva secretion, thereby causing dry mouth. It may also be accompanied by symptoms such as dry eyes, dry skin, and joint pain. It is recommended to follow medical advice to use medications such as cyclosporine soft capsules, methylprednisolone tablets, and hydroxychloroquine sulfate tablets to alleviate symptoms.
5. Diabetes
Diabetes mainly results from defects in insulin secretion or impaired biological function, leading to elevated blood glucose levels. This may increase plasma osmotic pressure, producing an osmotic diuretic effect that causes excessive fluid loss through urination, resulting in dry mouth. Common accompanying symptoms include polyuria, polydipsia, and weight loss. It is recommended to follow medical guidance in using medications such as acarbose tablets, metformin hydrochloride tablets, and glimepiride capsules for treatment.
In daily life, it is advisable to drink an appropriate amount of water before bedtime and adjust dietary structure, avoiding high-salt foods before bedtime or during dinner.
References
[1] Liu Ting, Jia Chanyi. Clinical Observation of Five-Juice Drink in Relieving Dry Mouth Symptoms in Sjögren's Syndrome [J]. Chinese Medicine Modern Distance Education of China, 2025, 23(04): 122-124+137.
[2] Yu Can, Yu Dongrong. Is Dry Mouth and Dry Eyes Really Just a Matter of Simple Dehydration? [J]. Health Abroad, 2025, (02): 26-27.
