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Why Do I Keep Waking Up at Night? Common Causes of Interrupted Sleep and Trouble Falling Back Asleep
Aug 27, 2026 | 6 min read

With endless distractions, everyday life stress, and an increasingly digital environment, dozing off and staying soundly asleep can be a challenge for any adult in the modern world. Still, it's normal to wonder, Why do I keep waking up at night?

There can be many potential reasons for constantly waking up at night and having trouble getting back to sleep—from mental stimulation and emotional stress to health conditions and age-related factors. These common causes can affect how you feel when you wake and may even leave you asking why do I wake up tired after what seemed like enough sleep.

We'll go over the possible causes ahead, as well as what you can do to get better, more restorative shut-eye.

Why Interrupted Sleep Happens More Often Than You Think

Brief wakeups during the night are normal and not necessarily a cause for concern. But several awakenings could affect your sleep quality, especially if you struggle to fall back asleep each time.1

You could be waking up without realizing it and then dozing back off quickly. Or maybe you're well aware of how often it happens throughout the night. A variety of factors, from everyday stress to nervous system activation and recovery imbalance, may all affect sleep continuity (being able to fall asleep and stay asleep without frequent wakeups).2,3

As you're probably aware, interrupted sleep might affect next-day energy, focus, and mood. Over time, poor sleep, restless sleep, or recurring sleep disturbances may contribute to fatigue and emotional stress.

Why Do I Keep Waking Up at Night?

Possible explanations for why you're waking up a lot during the night:

  • Occasional stress and an overactive nervous system
  • Blood sugar and overnight energy changes
  • Lifestyle habits that affect sleep quality
  • Hormonal and age-related changes

Let's go over each in more detail.

Stress and an Overactive Nervous System

The mental tension and heightened alertness from everyday stress may make it harder for your body to remain relaxed overnight while contributing to middle-of-the-night awakenings. This includes feelings of burnout, as well as day-to-day stressors.

Increased cortisol (a stress hormone), an extra-active central nervous system, and feeling "wired but tired" might play a role in disrupted sleep.4,5 If your mind is racing at night, stress management techniques for sleep and gentle relaxation techniques may help support a calmer wind-down routine.

Blood Sugar and Overnight Energy Changes

Eating close to bedtime (even a nutritious late-evening dinner) and drinking alcohol can increase your blood sugar. This might temporarily elevate your heart rate when you're trying to fall asleep, a time when it's supposed to dip naturally to help you drift off.6

A spike in blood pressure could mean it takes you longer to fall asleep or contribute to nighttime wakeups.7 Or you might notice more awakenings in the early morning hours (between 2 and 5 AM) when stress and metabolic factors overlap.8

Lifestyle Habits That Affect Sleep Quality

Drinking alcohol (especially multiple drinks late into the evening), having caffeine in the afternoon, or screen exposure an hour or two before bed might affect your sleep quality. An inconsistent daily schedule or working night shifts can make it more difficult to consistently get enough sleep.9

Other factors include social media use, TV-watching habits, whether you sleep with a pet (or possibly a partner), and how much outdoor time you get each day. These habits may disrupt your sleep-wake cycle, affect your internal clock, and make it harder to sleep at the same time each night.

Even healthy habits can disrupt sleep, depending on the timing. For example, regular exercise is associated with better-quality sleep, but a strenuous workout too close to bedtime could make it harder to fall asleep and stay asleep.10,11

Hormonal and Age-Related Changes

With age and the hormonal changes that happen during perimenopause, people experience natural changes in sleep architecture.2,12,13 These are the patterns and cycles your brain goes through while you sleep.

You cycle through different types of sleep, including light, deep, and rapid eye movement (REM) sleep.14 In the later seasons of life, you might have more early-morning awakenings or feel like you're sleeping lighter overall.13

Why Can't I Fall Back Asleep?

Here's what could be going on if you can't fall back asleep after waking up in the middle of the night.

Mental Alertness After Waking

When you wake up in the middle of the night, your brain might quickly shift into problem-solving mode or a stress state—particularly if you've got a lot on your plate and are facing many daily stressors.

Tapping your phone to see what time it is or keeping a digital alarm clock on your nightstand with an LED time display might add to the worry of not being able to fall back asleep and contribute to wakefulness during the night.15

Stress Hormones and Sleep Disruption

Stress hormones, including cortisol, corticotropin-releasing hormone (CRH), and copeptin, might activate at night due to lifestyle factors or daily stressors. This could get in the way of relaxation and make it harder to fall back asleep after waking up. And your body may stay physiologically alert, even when you're physically tired.16

Sleep Pressure Naturally Declines Overnight

Sleep pressure (aka homeostatic sleep drive) is the biological drive to go to sleep that builds up and becomes harder to ignore the longer you stay awake.17 As cortisol naturally rises in early-morning hours, your body's internal drive to be asleep decreases closer to your wake-up time. This can make falling back asleep harder around this time of night.18

The Connection Between Stress, Recovery, and Sleep Quality

Let's explore how stress, recovery, and sleep quality are interconnected.

Sleep and Stress Affect Each Other

As you're likely well aware, stress may negatively affect your sleep quality.19 And it goes both ways: Poor sleep could increase feelings of tension, emotional exhaustion, and mental fatigue. This can become a vicious cycle where life stressors and sleep deprivation make each other worse.20

Why Recovery Matters

Restful sleep supports physical and mental recovery. Too many interruptions during the night, or an ongoing lack of sleep, could affect how much energy you have during the day and how well your body recuperates after exercise. It can also impact your moods, ability to focus, and daytime resilience.21

Nervous System Support and Relaxation

Calming your nervous system with relaxing activities might help support a calmer transition into sleep.22

How so? Supporting your body's stress response through relaxation can help your nervous system better respond to and process physical pressure and emotional disruptions. This might play a role in how restful you feel at night, helping you drift off and stay asleep for longer.23

Nutrients and Supplements Commonly Used for Sleep and Stress Support

One thing that might help is a personalized nutrient plan with sleep supplements and/or supplements that support relaxation and a healthy stress response during occasional times of sleeplessness.

Magnesium and Relaxation Support

Magnesium is commonly used to support muscle relaxation and a sense of calmness. It's often discussed in nighttime wellness routines, though you can take a magnesium supplement any time of day—consistency is most important.24

Adaptogens and Stress Support

Adaptogenic herbs and fungi are often used to support the body's natural response to occasional stress. They might also promote a sense of calm and an overall balanced state (known as homeostasis).

Common adaptogens include:

  • Ashwagandha (Withania somnifera)
  • Asian ginseng (Panax ginseng)
  • Cordyceps (Cordyceps militaris)
  • Rhodiola (Rhodiola rosea)

You can get these in supplement form, such as capsules and powders.

Melatonin and Sleep Timing

Melatonin is a natural hormone made by the body. Sometimes called the "hormone of darkness," it helps regulate circadian rhythm—your body's natural sleep-wake cycle (or "internal clock").26 Some people take melatonin supplements before bed for occasional help with falling asleep at a certain time.27

Amino Acids and Calming Nutrients

Certain amino acids and botanical extracts may help support relaxation and recovery before bed. These include L-theanine, gamma-aminobutyric acid (GABA), glycine, para-aminobenzoic acid (PABA), 5-hydroxytryptophan (5-HTP), chamomile, and valerian root (Valeriana officinalis).28,29,30,31

Taking these nutrients in supplement form or drinking calming tea every night could influence your sleep quality over time.

Habits That May Support More Restful Sleep

Here's what might help if you're having trouble staying fast asleep:

  • Consistent sleep and wake times: Research shows that going to bed and waking up at the same times each day may support a more stable circadian rhythm.32
  • Daylight exposure: Getting outdoors and into the natural daylight, especially in the morning, has been shown to support sleep regulation.33
  • Creating a calmer evening routine: To help your brain transition from a stress state into rest mode, follow a pre-bed relaxation ritual with lower lighting, self-care practices, and reduced screen exposure.
  • Sleep environment considerations: Set the thermostat to a cooler temperature, reduce noise, minimize disruptions, and make your bedroom as dark as possible to support uninterrupted sleep.35

When Ongoing Sleep Issues May Need More Attention

Persistent fatigue, mood changes, or difficulty concentrating despite supportive lifestyle changes can be signs that sleep disruption is affecting your daily life and ability to function. In that case, it's best to seek professional support.

Get in touch with a healthcare provider if you're experiencing long-term sleep disruption, chronic stress, or insomnia. Snoring, gasping, or other unusual nighttime symptoms also call for professional guidance.

What to Expect When Supporting Better Sleep

Adjusting your daily routine, incorporating healthy lifestyle habits, and possibly taking supportive or functional supplements might help you get in the zone for sleep and stay asleep for longer.

But keep in mind that improvements are often gradual rather than immediate. Stress-related sleep disruptions may take time to regulate, so focus on positive changes over time. And always remember to reach out to your healthcare provider if your sleep disruptions are ongoing or accompanied by other symptoms.

References:

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