Psychosomatics
Insomnia: When Brain Can't Switch Off
You’re lying in the dark, staring at the ceiling. body is exhausted, but your head is humming like an overloaded server. Thoughts are racing, from tomorrow’s to-do list to an awkward phrase you said five years ago. The harder you try to sleep, the more awake you feel. Sound familiar? This struggle is not a failure of your willpower. Insomnia isn’t a problem with your desire to sleep, but a physiological glitch: brain is stuck in “danger” mode and can’t switch over to rest.
Contents
The Main Points
Why Brain Won't Sleep: The Night Watchman Who Won't Go Home
Imagine brain is a large office. During the day, it’s bustling with activity: meetings, calls, tasks. This is managed by the sympathetic nervous system—our internal “activation manager.” When the workday ends, the night watchman arrives—the parasympathetic nervous system. His job is to turn off the lights, lock the doors, and put the building into a quiet, restorative mode. Insomnia begins when the “activation manager” refuses to go home. He keeps running around, checking reports, and making calls, long after everyone else has left.
This restless manager is a metaphor for a state of hyperarousal. When you spend your day under pressure—from work, family issues, or a constant stream of news—your blood circulates high levels of stress hormones, primarily cortisol. Cortisol is an ancient mechanism that helped our ancestors survive encounters with saber-toothed tigers. It sharpens focus, speeds up the heart, and prepares muscles for action. The problem is, brain doesn’t distinguish between a saber-toothed tiger and a project deadline. The reaction is the same: “Danger, stay alert!”
In the evening, when cortisol levels should naturally decrease, they remain high in a person with chronic stress. brain is literally continuing to “scan the perimeter” for threats, even when you’re lying in a cozy, safe bed. This isn’t your fault or a sign of weak character; it’s pure physiology. You can’t sleep not because you aren’t “trying correctly,” but because nervous system is stuck with its foot on the gas and can’t hit the brakes.
The Paradox of Effort: Why "I Have to Sleep" Is the Worst Strategy
What do you do when you can’t sleep? You probably start an internal dialogue: “Come on, sleep! Tomorrow’s a big day, I’ll be a wreck,” “Why is everyone else asleep but me?”, “Okay, I need to relax. Relax! Now!” And the louder these commands get, the brighter the lights stay on in your head. This phenomenon is known as the paradox of effort.
Sleep, like breathing or digestion, is an automatic process. You can’t command your heart to beat slower or your stomach to digest food faster. Trying to consciously control something that should happen on its own has the opposite effect. When you tell yourself “I have to sleep,” brain registers it as a task that must be solved urgently. And an unsolvable task is a source of stress.
This is where the amygdala, a tiny region in the brain responsible for threat detection, comes into play. To the amygdala, the command “I have to sleep” followed by failure sounds an alarm: “We’re in trouble! Something is wrong!” In response, it triggers the release of adrenaline to “help” you cope with the problem. As a result, you get the exact opposite of what you wanted: instead of calm, a fresh jolt of arousal. You’re caught in a vicious cycle: you can’t sleep, you get anxious about it, and that anxiety makes it even harder to sleep. Turning your bed from a place of rest into a battlefield is a sure path to chronic insomnia.
Is "Sleep Debt" a Myth or Reality?
One of the main sources of anxiety around insomnia is the fear of its consequences. “I didn’t get my 8 hours, so I’ll be useless tomorrow,” “I’m accumulating a sleep debt that will ruin my health.” While this idea has some basis, it’s often exaggerated and only makes things worse. The brain is an incredibly flexible and resilient system. One, two, or even three bad nights will not cause irreparable harm.
Throughout the day, a substance called adenosine builds up in brain. You can think of it like sand in an hourglass: the longer you’re awake, the more “sand” accumulates, and the stronger the “sleep pressure” becomes. This chemical pressure is the main driver of sleepiness. Caffeine, for example, works by temporarily blocking adenosine receptors, which is why we stop feeling tired. When you don’t sleep, adenosine continues to build up. That’s why, after a sleepless night, it’s usually easier to fall asleep the next night—the sleep pressure is very high.
The problem with chronic insomnia isn’t the “debt,” but the fact that high levels of cortisol and adrenaline are “shouting over” the adenosine signals. body wants to sleep, but brain won’t let it. By focusing on “sleep debt,” you only amplify the anxiety that is the root of the problem. It’s far more productive to shift your focus: instead of panicking about lost hours, work on lowering nervous system’s overall arousal level during the day and especially in the evening.
What's the Most Common Cause of Insomnia in a Healthy Person?
In a physically healthy person, insomnia is most often the result of chronic stress, heightened anxiety, and poor sleep hygiene. The cause is not a disease, but the brain’s learned habit of being in a state of hyperarousal. This is reinforced by working late, using gadgets before bed, and trying to solve problems while lying in bed.
What You Can Do Tonight
To break the vicious cycle of insomnia, you need to stop fighting for sleep and start helping nervous system to calm down. Here are a few concrete steps:
When Is It Time to See a Specialist?
If your insomnia has lasted for over a month, seriously affects your daytime functioning, work, and mood, and self-help strategies aren’t working, it’s time to seek help. This is especially true if the insomnia is accompanied by persistent low mood, loss of interest in life, or panic attacks.
In therapy, we don’t look for a “magic pill.” Together, we figure out what is keeping nervous system in a constant state of arousal. Often, it’s underlying beliefs, hidden anxieties, or ineffective ways of coping with stress. Using methods of Cognitive Behavioral Therapy for Insomnia (CBT-I), which is the gold standard for treating insomnia, we work step-by-step to change the thinking patterns and behaviors that prevent brain from “switching off.” This isn’t a battle with sleep, but a process of teaching brain new, healthy responses.
If you feel ready to understand the causes of your insomnia rather than just fighting the symptoms, you can book a consultation.
Frequently Asked Questions
Do sleeping pills help?
Sleeping pills can be effective for short-term problems, like jet lag or a period of acute stress. However, for chronic insomnia, they are a “crutch” that doesn’t solve the underlying problem of brain hyperarousal. Moreover, many can be habit-forming and can disrupt the natural architecture of sleep.
Can I "catch up" on sleep over the weekend?
Trying to “sleep in” on Saturday and Sunday by waking up 3-4 hours later than usual is a bad idea. It messes up your internal clock (circadian rhythms) and makes it harder to fall asleep on Sunday night, setting you up for another week of problems. It’s far more effective to maintain a consistent wake-up time every day, even on weekends.
Is it bad to nap during the day?
A short nap (15-20 minutes) can be refreshing and won’t harm your night’s sleep. But napping for longer than 30 minutes, or in the late afternoon, can reduce “sleep pressure” in the evening and make it harder to fall asleep. If you have chronic insomnia, it’s best to avoid naps for a while.
Is insomnia a symptom of depression?
Sleep disturbances, especially waking up too early in the morning, are indeed a key symptom of depression. However, insomnia does not always mean you have depression. It can be caused by anxiety, stress, or simply bad habits. But if, in addition to sleep problems, you notice a persistent low mood, apathy, and loss of joy, a consultation with a specialist is essential.
