Why Am I Thirsty in the Middle of the Night?  

Why Am I Thirsty in the Middle of the Night?  

Are you waking up several times a night to get a glass of water? Is your mouth so dry when you wake up in the middle of the night that you can’t easily go back to sleep? These are both signs of dehydration, which can ultimately be an uncomfortable medical situation to deal with. 

Staying hydrated is important. Our bodies are made up of 60% water, and water allows for our many bodily functions to continue as they should. For example, water helps our bodies grow cells, remove waste and digest food. 

How does water relate to sleep? Some think that drinking too little or too much water before bed can negatively affect sleep. Let’s look at what dehydration at night looks like, what it might mean and how IV mobile therapy can help you hydrate. 


Excessive Thirst at Night

If you find yourself continually thirsty at night, you may not be drinking enough water during the day. If you do drink enough water during the day, you’re less likely to be dehydrated and thirsty while you’re trying to sleep. Consider the following various strategies you can use to drink more water. 

Water During the Day

One way to make sure you’re hydrated at night is to drink eight glasses of water per day. You can even remind yourself to drink water via your cellphone with alarms or applications to help you keep track of your water intake.

While you sleep, you lose water, which is why it’s an excellent idea to drink a glass of water as soon as you wake up in the morning. This water will kick-start your metabolism and increase your energy. 

Drinks and Food

There are other options other than just plain water for staying hydrated at night. Alkaline water is water that ensures you’re extra hydrated and energized. If you don’t like the taste of tap water in general, try purified water or bottled water. You also always have the option of putting different flavors into your water, such as ginger, lemon or various fruit flavors. 

Another way to ensure you’re hydrated before sleep is to eat plenty of fruits and vegetables. These types of food are rich in water. When you’re at the grocery store, consider purchasing foods like apples, milk, cabbage or cucumbers. Overall, you get 20% of your water intake from water-rich foods and drinks. 

Water Before Bed

Water Before Bed

Drinking water right before bed is also an excellent idea. Drinking water right before bed can benefit you in the following ways:

  • Better mood
  • Cleaning body naturally
  • Better heart performance
  • Healthier skin
  • Better control of body temperature

Just ensure that you aren’t drinking too much water that you have to disrupt your sleep to get up and use the bathroom. One way to avoid this is to stop drinking water one to two hours before heading to bed. It all depends on your body’s tolerance. If you can sleep through the night after one cup one hour before bed, then go for it!

Finally, a great way to stay hydrated is to consult with your physician. They can give you more unique options for staying hydrated. 

Thirsty At Night But Not Diabetic?

Being thirsty at night does not necessarily mean you have diabetes. It’s more likely that you are suffering from dehydration when you’re overly thirsty at night. 

Let’s look at some questions to ask yourself when you’re thirsty at night that don’t involve diabetes. 

Am I dehydrated?

How much water you may need on a daily basis as an individual may be different from someone else, depending on your body and the activities you get up to during the day. 

For example, if you exercise frequently or work outside in the heat, you will likely lose more water daily than someone with an office job who does not exercise. It’s important to gauge how many electrolytes you lose every day, so you can replenish them and stay hydrated. 

If you suspect you are dehydrated, mobile IV therapy is a great solution. You can often schedule a same-day visit from a mobile medic and relieve some of your dehydration symptoms soon after you begin feeling unwell. 

Keep a special eye on the hydration of any of the younger or older people in your life, as sometimes their thirst levels cannot be trusted to reveal accurate levels of hydration. 

Is This Related to a Medication I’m Taking?

Various prescribed medications can cause thirst at night, such as antipsychotics, antidepressants, SGLT2 inhibitors, corticosteroids, anticonvulsants and anticholinergics.

If you find yourself waking up in the middle of the night thirsty after beginning to take one of these medications, it’s best to consult with your doctors, especially if you are unable to sleep because of your thirst. 

Is This a Hangover?

Is This a Hangover?

Alcoholic drinks dehydrate you, so if you’re feeling thirsty after a few drinks, that makes perfect sense. When you drink, you tend to urinate more, which results in the loss of water from your body. When alcohol breaks down in your body, a chemical called acetaldehyde is made. This chemical increases the thirst sensation.

If you’re hungover and you want to rehydrate before bed, consider drinking the following:

  • Water
  • Clear broth 
  • Herbal tea
  • Sports drinks 

Is This Because of Sleep Apnea?

Feeling extremely thirsty at night is also related to sleep apnea because afflicted individuals typically breathe through their mouths while sleeping. This breathing through the mouth then leads to a dry mouth, which may make you feel thirsty. 

If you use a continuous positive air pressure (CPAP) machine for your sleep apnea, your dry mouth may be even more uncomfortable. Check with your doctor to see if there are other machine alternatives if this is the case for you.

Could This Be Perimenopause or Menopause?

If you are experiencing perimenopause or menopause, you may find yourself thirsty at night. These medical experiences come with hormonal changes involving estrogen and progesterone, which regulate your body’s thirst and fluids. They can also cause night sweats and hot flashes that can lead to losing excess fluid at night. 

That being said, it’s important to drink extra water if you are experiencing menopause or perimenopause. 

Dehydration at Bedtime

If you’re dehydrated, you might feel tired, fatigued or lethargic. You may also experience muscle cramps, headaches and dry mouth. These symptoms may ultimately make it challenging for you to fall asleep. 

Lack of Sleep

Research shows a lack of sleep can also lead to dehydration. For example, there was a study on adults that ultimately showed that people who slept eight hours a night were less dehydrated than those who slept six hours or less. Although this study was associative, the fact that the same findings were seen in China and the United States is intriguing. 

There are concrete reasons why poor sleep negatively affects hydration. For example, your body loses water during sleep, and there is no way to replenish it because you’re asleep. This is why your body keeps a balanced level of hydration with its circadian rhythm.

The body makes a hormone named vasopressin that allows your body to retain water. If your sleep is interrupted throughout the night, the signals for this hormone are interfered with, which may lead to dehydration


If you sweat a lot while you sleep, this may cause you to become dehydrated. Consider keeping your room at a comfortable temperature to reduce the chances of heavy sweating. You can also consider wearing loose and light clothing to bed, so your skin can breathe more comfortably. 

Dry Mouth

Let’s say you wake up several times a night to get a drink of water because your mouth is so dry that you are too uncomfortable to sleep. If you have a dry mouth at night, you may be dehydrated. This dry mouth may cause you to have bad breath during the day that sticks with you no matter the tooth brushing and flossing. 

It’s obvious when you are experiencing dry mouth, but the reasons for it and how to prevent it are not always as obvious. Of course, you’re typically asleep at night, so having a dry mouth during the nighttime may be even more confusing. 

Let’s take a deeper dive into the symptoms and causes of and the preventative measures for dry mouth. 

What Is Dry Mouth?

Dry mouth, otherwise known as xerostomia, affects the mouth and its salivary glands. It leaves you without the ability to make enough saliva to keep your mouth moisturized. When you have a dry mouth, you may be producing too little saliva or none at all. 

Dry mouth typically appears along with other health conditions, such as dehydration, medication use or autoimmune diseases. This is precisely why it’s important to find out why you have a dry mouth. 

Dry Mouth Symptoms

Depending on the person, dry mouth at night may come with the following symptoms:

  • Dryness
  • A buildup of saliva in the morning
  • Dry or sore throat
  • Waking up because you feel like you’re unable to breathe
  • Dry and/or chapped lips
  • Bad breath 
  • Thick saliva
  • Waking up frequently to drink water
Dry Mouth Symptoms

If you have the following symptoms during the day, you could be facing dry mouth, which hydration may fix: 

  • Difficulty chewing, speaking or swallowing
  • A bad taste in your mouth
  • Increasing discomfort concerning dentures
  • Hoarseness


Causes of Dry Mouth

There are various causes of dry mouth other than dehydration. For example, clogged nasal passages, dental retainers or CPAP machines can cause dry mouth. Let’s take a look at some other causes below:

  • Simple aging
  • Diabetes
  • Muscle relaxants
  • Chemotherapy
  • Decongestants
  • Pain medications
  • Caffeine
  • Tobacco use
  • Neck or head damage
  • Stroke
  • Thrush
  • Nerve damage in the head or neck
  • Blood pressure medication
  • Diuretics
  • Beta-blockers
  • Antihistamines
  • Anti-hypertensives
  • Antidepressants

Why Is My Mouth So Dry When I Wake Up?

There are a few reasons why your mouth could be dry upon waking. One reason is that your body decreases its production of saliva at night. You may be more likely to breathe through your mouth at night, allowing air to move in and out of your mouth, drying it in the process. Dehydration is another reason for waking up with a dry mouth. During the night, your body loses water, and you don’t have the chance to drink water. 

How to Prevent Dry Mouth While Sleeping

If you suffer from dehydration and dry mouth while sleeping, there are several ways you can remedy it, depending on the cause. One remedy may work for you, while others may not. Here are several remedies for relieving dry mouth to consider:

  • Rehydrate with mobile IV therapy. 
  • Add moisture to the air with a humidifier.
  • Drink as much water as possible throughout the day.
  • Use toothpaste with fluoride in it.
  • Avoid mouthwash with alcohol in it.
  • Avoid sugary, spicy and acidic foods before sleeping. 
  • Avoid drinking alcohol or coffee right before bedtime. 
  • Find a moisturizing spray for dry mouth. 
  • Chomp on some sugar-free chewing gum.
  • Purchase some nasal spray or nasal strips.
  • Avoid decongestants. 
  • Find a saliva substitute. 
  • Discontinue medications that may cause dry mouth if your doctor says it’s safe to do so. 

If you leave dry mouth untreated, you could suffer other health problems, so it’s important to address it right away. It could be as simple as rehydrating yourself before bed or keeping yourself hydrated throughout the day!


Rehydrate With Mobile IV Medics

Rehydrate With Mobile IV Medics

One way to hydrate yourself quickly and efficiently is to get yourself hooked up to an IV. With Mobile IV Medics, you’ll be able to book your Mobile IV Therapy so that it comes right to your door, which is especially lovely if you aren’t feeling well! Hopefully, once you’re hydrated with our IV Hydration Package, you’ll be able to enjoy many peaceful nights of sleep to come. 

Learn more about us when you use our online contact form or give us a call at 833-483-7477.


About the author

Brad Wenderoth, Pharm.D.

Brad Wenderoth, Pharm.D. is a licensed pharmacist and co-owner of Mobile IV Medics. With over 16 years of healthcare experience, Brad is bringing his expertise and passion for patient care to the Mobile IV Medics patient population. Prior to Mobile IV Medics, Brad worked in varying areas including both direct patient care and hospital leadership at Keck Medicine of the University of Southern California (USC) in Los Angeles, nationwide health system pharmacy consulting for Comprehensive Pharmacy Services (CPS), and professor of pharmacy at the USC School of Pharmacy. He holds a doctorate in pharmacy from the University of Arizona, a pharmacy practice residency from USC, and a lean six sigma green belt from Johns Hopkins.