Why insomnia, nighttime awakenings, and non restorative sleep are often rooted in nervous system vigilance, not poor routines
Why your body may resist sleep even when you do everything “right” and what physiology, not willpower, has to do with it
Sleep Is Not a Discipline Problem
If sleep were simply a habit problem, most of my patients would sleep beautifully. They already do what they have been told to do. They limit caffeine. They go to bed at reasonable hours. They use supplements. They meditate. They keep their rooms dark and cool. They follow the rules. And yet, many of them lie awake. Others fall asleep only to wake at one, two, or three in the morning. Some sleep through the night and still wake feeling as though they never truly rested.
When this happens over and over, people begin to turn inward in a familiar way. They assume they are doing something wrong. They tell themselves they need better discipline, a better routine, or the right supplement. In clinic, I often hear some version of, “I must be missing something.”
What if the problem is not effort at all?
What if your body is not refusing sleep, but protecting you?
Sleep Requires Surrender
Sleep is not simply a mechanical act. It is an act of surrender. That’s why we use the phrase, “falling asleep”, we have to let go of consciousness in order to achieve sleep. In order to do this, your nervous system must relax and release. Everything that goes along with the nervous system relaxing has to occur, the vigilance that you hold in your consciousness reduces, muscle tension diminishes, your breathing slows, as your awareness drifts. From a biological perspective, this only happens when the body perceives safety.
If the nervous system remains on alert, sleep becomes shallow, fragmented, or impossible. You may feel tired, even deeply tired, but the internal signal that permits surrender never arrives. This is not a mindset issue. It is physiology.
The Role of the Autonomic Nervous System
Sleep is governed largely by the balance between the sympathetic and parasympathetic branches of the autonomic nervous system. The sympathetic system prepares you for action. The parasympathetic system supports rest, digestion, repair, and sleep.
Chronic stress, illness, trauma, inflammation, and environmental exposures all bias the system toward sympathetic dominance. When this happens, the body may appear exhausted, but internally it remains vigilant. Patients often describe this state as “tired but wired.” The body longs for rest. The nervous system does not permit it. This is why simply trying harder to sleep rarely works. You cannot will your way into safety, and you can’t will your way into a process that requires surrender.
Why Sleep Hygiene Is Often Not Enough
Sleep hygiene focuses on behavior. Those behaviors matter, but they assume the nervous system is capable of responding to them. If your system does not feel safe, no amount of routine will override that signal.
This is why people can follow impeccable sleep hygiene and still struggle. YOu can darken your room. Use block out shades, eye masks, and sound machines. You may even wear blue blocker glasses, have only candles for light sources, put your computers, tablets and phones away early, even put your phone off, take all your supplements, pray, meditate and sleep may not arrive. You may practice your vagus nerve exercises and use devices – like I do! You are performing all the helpful behaviors, but your nervous system is stuck in overdrive.
Nighttime Awakenings Are Not Random
One of the most common complaints I hear in the clinic is waking in the middle of the night. For many people, the pattern is remarkably consistent. They fall asleep without much trouble, only to wake between one and three in the morning with a racing mind, a pounding heart, or a sudden sense of alertness. Sometimes they return to sleep. Sometimes they lie awake for hours. But even if you fall back asleep, frequent night time arousals, as any parent of a newborn will tell you, is exhausting!
This window corresponds with a period of significant physiological transition. The body is shifting between stages of sleep. According to Traditional Chinese Medicine, the hours between 1am and 3am are liver time and this is a common time for arousals – because our livers are overtaxed, with alcohol or other toxins.
When inflammation is high, toxins are mobilized, or blood sugar is unstable, this transition can trigger a stress response. Then cortisol rises, adrenaline follows and your brain wakes up. From the inside, it can feel abrupt and inexplicable. From a biological perspective, it is a system responding to internal cues. This is not insomnia by choice. It is physiology expressing itself during a vulnerable moment.
Blood Sugar and Sleep
Blood sugar stability plays a critical role in the ability to stay asleep. When glucose drops overnight, the body releases cortisol and adrenaline to compensate. These hormones are designed to protect you from hypoglycemia, but they also promote alertness.
If you are prone to reactive hypoglycemia, adrenal dysregulation, or mitochondrial inefficiency, this mechanism is more likely to activate. You may fall asleep easily, only to wake in the early morning hours with a sense of urgency in your body. Your mind switches on and your heart beat speeds up. This is not anxiety in the psychological sense. It is a metabolic alarm.
In many cases, stabilizing blood sugar improves sleep more reliably than any supplement ever could. This often means eating a fat and protein snack before dinner and then working to determine why the blood sugar is becoming more dysfunctional, which can also be related to the nervous system and adrenal dysfunction!
Inflammation and Immune Signaling at Night
The immune system becomes more active at night. Inflammatory mediators, such as cytokines can fluctuate. Histamine release can increase, especially if you are exposed to or eating foods that your body doesn’t like. And mast cells, like our other organs follow circadian rhythms.
For individuals with inflammatory conditions, mast cell activation, mold illness, or chronic infections, nighttime can be a period of heightened immune activity. Symptoms may include itching, flushing, anxiety, palpitations, temperature dysregulation, or vivid dreams.
When these sensations appear during the night, they are often interpreted as psychological. In reality, they reflect immune physiology intersecting with sleep. The body is not misbehaving. It is communicating.
I often hear of people feeling very uncomfortable with their vivid dreams. Coming from someone who struggles to remember my dreams, I envy you! And even if your dreams may be unpleasant, it is a path for the subconscious to communicate to you. Not everything is as it seems in the dream. Symbolism runs supreme because our subconscious is not always literal.
As an example, I recall a very weird dream where there was a lot of feces spread all over a room. Really gross, right? Think about it, what might the metaphor be? In dreams, feces almost always symbolize release, waste, or something that no longer serves you.
At a psychological level, it’s about letting go, of emotional buildup, old beliefs, shame, resentment, burdens, or patterns you’ve been carrying. Just as the body eliminates what it cannot use, the psyche uses this imagery to show that something is ready to be expelled from your inner world. So when in doubt, keep a notebook by your bed and if you can’t get back to sleep or you want to investigate the meaning of a dream, write it down while it is fresh in your mind!
Histamine as a Wake-Promoting Signal
Histamine is not only involved in allergies. It is also a wake-promoting neurotransmitter. Elevated histamine can make it difficult to fall asleep and even harder to remain asleep. This is why some people feel wired at night, especially after eating histamine-rich foods or during allergy or mast cell flares. It is also why many antihistamines can cause sedation.
When histamine is driving sleep disruption, melatonin alone is rarely sufficient. The more important question becomes why histamine is elevated in the first place. These things need to be investigated: food sensitivities, gut dysbiosis, mast cell activation, mold exposure, and chronic inflammation are common contributors.
Mold, Toxins, and Nighttime Vigilance
Environmental exposures also matter. Mold and mycotoxins, in particular, can activate limbic circuitry and increase nighttime vigilance. Many patients describe a sense of being on edge at night without knowing why.
This is not imagined. It is neuroinflammatory. The brain is responding to threat signals even during rest. Until that burden is addressed, sleep often remains fragile.
Although I only unraveled the facts years later, I remember wandering my house in Oregon in my late mid 30s at night, unable to settle down. I felt so wired on coffee although I knew I was exhausted. It was mold driving neuroinflammation and preventing my sleep.
Trauma Lives in the Nervous System
Trauma is not limited to catastrophic events. There is what I call big “T” trauma – death of a loved one, abuse, neglect, divorce, etc. and little “t” trauma, such as chronic stress, illness, and loss shape autonomic responses over time. For many people, nighttime quiet allows unresolved signals to surface. The body remembers what the mind may not consciously revisit.
This does not mean insomnia is psychological. It means the nervous system learned to remain alert. Sleep improves when safety is restored, not when symptoms are suppressed.
Supplements Are Tools, Not Solutions
Supplements can be useful. Melatonin, magnesium, glycine, and herbs often provide temporary relief. But they do not override physiology. Believe me, I love magnesium, magnolia, valerian, as well as natural forms of gaba, 5 hydroxy-tryptophan. In fact, 5-HTP is essential for not just healthy sleep for me but my mental health, too.
When sleep improves briefly and then deteriorates again, it is a sign that deeper drivers remain. Chasing supplements can become frustrating and costly. Understanding why your body resists sleep creates the possibility of lasting change. It is worth trying the supplements, but then recognize that there is deeper root causes AND more profound healing available.
A Pattern I See in Clinic
Sometimes, patients often arrive exhausted not only from poor sleep, but from trying to fix it. They have done everything they were told, and they feel defeated. At first, we focus on a more supportive supplement routine, layer in vagus nerve devices and exercises, and then take a broader functional medicine perspective that we have mapped out above. When we step back and evaluate nervous system tone, inflammation, metabolic stability, and environmental burden, the picture becomes clearer. Sleep was never the primary problem. It was the messenger.
A Different Way to Approach Sleep
Instead of asking, “How do I force myself to sleep?” a different question becomes more useful: What does my body need in order to feel safe enough to rest?
For many people, the answer involves stabilizing blood sugar, reducing inflammatory load, supporting detoxification gently, restoring circadian rhythm, and calming the nervous system. Sleep follows safety. It cannot be forced.
Why This Requires Individualized Care
Sleep disturbances are inherently multifactorial. What keeps one person awake may not affect another. This is why protocol-based approaches fail so often.
At The Spring Center, we evaluate sleep in context. Hormones, inflammation, toxins, nervous system regulation, circadian rhythm, and metabolism are all considered. Sleep does not exist in isolation. Just like insomnia’s companion, fatigue is multifactorial.
A Reframing Worth Holding
If you struggle with sleep, your body is not betraying you. It is communicating. Listening to that message with curiosity instead of frustration changes everything. When the body feels safe, sleep returns more naturally. Perhaps not perfectly, certainly not instantly, but reliably. And when sleep improves, everything else becomes easier to heal.
In the Unforgetting Project, insomnia is the soul’s signal that the system has forgotten how to trust the dark. Night is the symbolic realm of the unknown, the unconscious, the womb, even death. In some cultures, sleep is known as “ the little death.” To layer metaphor onto this, to sleep is to return to the realm of the unknown, which is scary for those who fear lack of control, who strive for perfectionism, who have learned that to be relaxed is to be vulnerable to attack. So when someone struggle to fall asleep, the body is saying:
“There is something unresolved that I am still guarding against.” “There is a memory I do not yet trust to release.” or “There is a part of me that believes vigilance equals survival.”
At the deepest level of healing, restoration of sleep and healing insomnia will occur when the body is confident it is safe to let go.
Sending you love,
Dr Kelly
References
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