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Why Do You Wake Up with Dry Mouth? 6 Causes and 7 Solutions

Published: Jul 05, 2021
Updated: Feb 22, 2025
Why Do You Wake Up with Dry Mouth? 6 Causes and 7 Solutions
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    8 min

    Do you always wake up feeling like your mouth is dry and uncomfortable? Does it make you feel like reaching out for a glass of water immediately? Do you find you have a bad taste in your mouth once you wake up? If your answer to these questions is yes, then you might be experiencing dry mouth while sleeping.

    In this article, we’ll explore the possible causes of dry mouth at night, its effects on your well-being, and practical solutions to keep your mouth hydrated at night.

    Key Takeaways
    Sleeping with an open mouth or snoring can contribute to waking up with a dry mouth.
    Certain medications such as anti-anxiety medications, antidepressants or anti-allergy medications can cause side effects of dry mouth to occur.
    Dry mouth tends to occur more frequently in older adults, with a higher prevalence in individuals over 65 years old.
    Avoid spicy or acidic foods before bedtime, limit caffeine consumption, and reduce alcohol intake.
    You may consider solutions such as taking frequent sips of water throughout the day, chew on sugar-free gums or suck on ice cubes as a way to stimulate saliva production and keep the mouth moist.

    What Is Dry Mouth?

    what is dry mouth

    A dry mouth, also called xerostomia, refers to a health condition that occurs when you don’t make enough saliva to keep your mouth wet [1]. A dry mouth can happen sometimes when nervous or stressed. However, if you’re experiencing it for an extended period, it could cause complications such as difficulty chewing, swallowing, or talking.

    Additionally, the lack of saliva in a dry mouth can increase the risk of tooth decay or gum disease due to bacteria accumulation.

    Common dry mouth symptoms

    A dry mouth may result in symptoms such as:

    • Sore throat
    • Dry tongue
    • Difficulty swallowing
    • Difficulty speaking
    • A bad taste in the mouth
    • Hoarseness
    • Bad breath

    What Causes Dry Mouth When You Wake Up?

    What Causes Dry Mouth When You Wake Up?
mouth breathing

    The reasons for dry mouth when waking up could be categorized into the following 6 aspects.

    1. Blocked Nose and Mouth breathing

    Your dry mouth may be intricately linked to your sleep habits, particularly if you find yourself waking up with a parched sensation. Having a blocked nose not only causes you to snore but it also leads to you having to breathe out of your mouth [2]. Mouth breathing during sleep causes airflow to be more pronounced, causing a rapid evaporation of saliva and leaving the oral cavity dry.

    Xerostomia or dry mouth symptoms are also common in patients with sleep apnea compared to those without this condition [3].

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    2. Medications

    medications can be a cause of dry mouth

    Dry mouth is a prevalent side effect associated with the use of various medications, including medications used for allergies, antidepressants, stimulant medications that treat ADHD, prescriptions for pain and anxiety, and mood stabilizers [4]. The pharmacological compounds in these medications can interfere with the normal functioning of salivary glands, leading to a reduced production of saliva. This decrease in saliva flow is a key contributor to the sensation of dry mouth.

    3. Underlying medication conditions

    Certain medical conditions, such as diabetes, stroke, and Alzheimer’s disease, can contribute to the development of dry mouth. In individuals with diabetes, persistent high blood sugar levels can lead to increased urine production, potentially causing dehydration and subsequent dry mouth [5].

    Stroke survivors may experience difficulties with swallowing and altered salivary gland function, leading to reduced saliva production. Alzheimer’s disease, with its complex neurological impact, can also influence the body’s ability to regulate hydration levels, contributing to dry mouth.

    4. Tobacco and alcohol

    Consuming alcohol can exacerbate dry mouth as it possesses acidic properties, contributing to dehydration and potential dental issues. The acidity in alcoholic beverages can further compromise oral health, making individuals more susceptible to conditions like tooth decay. Additionally, tobacco use can alter the rate of salivary flow, diminishing the natural protective effects of saliva and impacting overall oral health.

    5. Cancer therapy

    Radiation therapy to the head and neck area can cause dry mouth symptoms. Chemotherapy can damage and cause inflammation in the salivary glands, resulting in a lesser production of saliva. As a result, this leads to dry mouth [6], [2].

    woman holding her neck and a cup in another hand

    6. Aging

    Aging people tend to experience dry mouth more frequently. Some research has shown that 30 percent of adults over 65 years old and nearly 40 percent of adults over age 80 years may have this condition due to polypharmacy— the use of many medications at the same time [7].

    See also: Are Your Medications Affecting Sleep At Night?

    Solutions to Help with Dry Mouth

    doctor writing prescription

    A dry mouth can be an unpleasant and uncomfortable experience for anyone. Be it a temporary or a long-lasting issue, here are some treatment options that can help with it:

    1. Drinking water: Taking sips of water throughout the day and during meals can help to keep your mouth moist.
    2. Chewing on sugar-free gum: You can also stimulate saliva production by chewing on sugar-free gum or sucking on some sugar-free sweets.
    3. Using saliva substitutes: You may opt for over-the-counter saliva substitutes such as sprays or gels that contain xylitol.
    4. Using a humidifier: Using a humidifier can add moisture to the air, which is useful if you are someone who breathes through your mouth.
    5. Sucking on ice cubes or ice lollies: Sucking on ice cubes or ice lollies can also help to increase saliva production in the mouth and keep it moist.
    6. Using a lip balm: Apply lip balm regularly to help soothe dry, cracked lips. This will prevent further discomfort and damage from the external environment.

    If your dry mouth is severe or persistent or causes difficulty with eating or swallowing, you are strongly recommended to consult with your doctor for further advice and treatment.

    Conclusion

    Waking up with a dry mouth can be more than just an annoyance, it can affect your oral health, comfort, and overall well-being. Whether it’s caused by mouth breathing, medication,s or underlying medical conditions, taking steps to stay hydrated can help to significantly reduce the discomfort.

    If you’re looking for more ways to improve your sleep and wake up refreshed, try ShutEye® app. ShutEye offers personalized solutions from soothing sleep sounds to sleep tracking tools to help you sleep better at night. Try it for FREE today!

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    FAQ

    There are many reasons why you may wake up in the morning with dry mouth including mouth breathing at night, taking certain medications, smoking or drinking alcohol or underlying health conditions.

    Dry mouth at night is a common symptom of diabetes. However, it does not necessarily mean that you have diabetes if you have dry mouth. There could be other causes of dry mouth.

    Occasional dry mouth is usually not a cause for concern. However, severe and persistent dry mouth may be an indication of an underlying medical condition such as diabetes or Sjögren's syndrome. Additionally, you should consult a doctor if it starts to affect your ability to eat, swallow or talk.

    A deficiency in Vitamin B6 can contribute to having dry mouth at night.
    About authors
    Jessica Brown, a 29-year-old freelance copywriter passionate about human nature and deeply committed to promoting sleep and mental health awareness. Jessica holds a Master of Arts in Literary Studies from the National University of Singapore and a Bachelor's in Biology from the University of Cambridge.
    Siti Amirah
    Reviewer
    Amirah is a content writer passionate about topics related to mental health and wellness. Recently, she delved into the realm of sleep health, spurred by a personal recognition of her subpar sleep habits and a desire for improvement. Amirah holds a Bachelor’s Degree in International Communication Studies from the University of Nottingham.

    American Cancer Society (2024) Mouth Dryness or Thick Saliva [online]. Available at: https://www.cancer.org/cancer/managing-cancer/side-effects/eating-problems/dry-mouth.html

    Cannon, I., Robinson-Barella, A., McLellan, G., and Ramsay, S. E. (2023) From Drugs to Dry Mouth: A Systematic Review Exploring Oral and Psychological Health Conditions Associated with Dry Mouth in Older Adults with Polypharmacy. Drugs & aging40(4), 307–316 [online]. Available at: https://doi.org/10.1007/s40266-023-01017-5

    Fletcher, J. (2021) What is the connection between dry mouth and diabetes? [online]. Available at: https://www.medicalnewstoday.com/articles/dry-mouth-and-diabetes

    Murdock, J. (2024) Is Your Medication Causing Dry Mouth? [online]. Available at: https://www.goodrx.com/drugs/side-effects/dry-mouth-are-your-medications-to-blame

    National Institute of Dental and Craniofacial Research (2024) Dry Mouth [online]. Available at: https://www.nidcr.nih.gov/health-info/dry-mouth

    NHS Inform (2022) Dry Mouth [online]. Available at: https://www.nhsinform.scot/illnesses-and-conditions/mouth/dry-mouth/

    Pico-Orozco, J., Carrasco-Llatas, M., Silvestre, J., and Silvestre-Rangil, J. (2020) Xerostomia in patients with sleep apnea-hypopnea syndrome: A prospective case-control study. Journal of Clinical and Experimental Dentistry, 12(8), e708 [online]. Available at: https://doi.org/10.4317/jced.56593

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