Is It Normal to Forget to Breathe While Awake?

Momentarily “forgetting” to breathe while awake is surprisingly common and, in most cases, perfectly normal. Your brainstem runs breathing on autopilot around the clock, but that autopilot can be briefly overridden or disrupted by concentration, stress, posture, or simply becoming aware of your own breathing. The sensation of suddenly realizing you haven’t taken a breath for several seconds can feel alarming, yet it rarely signals a serious problem. That said, the line between a harmless quirk and something worth investigating does exist, and knowing where it falls matters.

How Your Brain Keeps You Breathing Without Thinking About It

Breathing is one of the few bodily functions that operates on two tracks simultaneously. The automatic track is managed by a cluster of neurons in the lower brainstem, particularly in a region called the pre-Bötzinger complex. Research on neonatal rat brainstems first identified this area as a kind of pacemaker for breathing rhythm: neurons there fire in rhythmic bursts that drive the inhale-exhale cycle without any conscious input from you.¹ The broader respiratory network extends across several brainstem compartments from the pons down to the lower medulla, with different groups of neurons handling the timing of inspiration, the transition to expiration, and the motor signals that move your diaphragm and chest wall.²

The voluntary track kicks in when you decide to hold your breath, blow out a candle, or speak. During conversation, your brain actively suppresses the automatic breathing rhythm to control when and how deeply you inhale between phrases. Neuroimaging during natural conversation shows that the cortex, cerebellum, and brainstem respiratory centers work together to override automatic breathing about 200 milliseconds before you start speaking.³ This dual-control system is remarkably flexible, but that flexibility is also why your breathing can sometimes fall out of its usual rhythm when your attention is elsewhere.

Why You Notice It When You’re Concentrating

Many people first notice the “forgetting to breathe” feeling while absorbed in a task: reading, scrolling through a phone, working at a computer, or playing a video game. What seems to happen is that the voluntary system partially engages without full conscious intent. You’re not deliberately holding your breath, but mental focus appears to dampen the brainstem’s automatic signals just enough to produce shallow breathing or brief pauses. Some tech workers and journalists have informally called this “screen apnea” or “email apnea,” though neither term has a formal medical definition.

Posture plays a real role here. Slouching compresses the abdomen and limits how far the diaphragm can move downward, which reduces how effectively you breathe. A study of healthy young men found that slouched sitting lowered a key measure of inspiratory muscle strength by roughly 9 cmH₂O compared to upright sitting.⁴ When your breathing muscles work less efficiently, each breath moves less air, and you may unconsciously hold your breath longer between cycles. Over hours at a desk, this can leave you feeling short of breath or suddenly gasping, prompting the unsettling thought that you “forgot” to breathe.

Stress, Anxiety, and Breath-Holding

Stress is one of the most reliable triggers for disrupted breathing patterns while awake. Under threat, your body shifts toward survival-mode breathing: faster, shallower breaths centered in the upper chest, along with intermittent breath-holding. These responses originally evolved for physical emergencies, but modern psychological stressors can trigger the same reactions. Inappropriate breath-holding, mouth breathing, and excessive upper-chest breathing have all been linked to emotional triggers, and these patterns can become conditioned over time so that even mild stress reproduces them.⁵

Anxiety adds another layer. Several anxiety disorders are associated not only with altered breathing but with heightened perception of breathing. When you’re anxious, you become more tuned in to bodily sensations, a phenomenon researchers call interoceptive sensitivity. The irony is that paying close attention to your breathing can itself make breathing feel abnormal, even when the pattern is objectively fine.⁶ So if you’re someone who frequently Googles “is it normal to forget to breathe,” there’s a decent chance that anxiety about your breathing is amplifying how much you notice small, natural pauses. This does not mean the sensation is imaginary. It means the alarm system is turned up too high for the level of actual risk.

The Role of Sighing

If you’ve ever caught yourself taking a sudden deep breath after a period of shallow breathing, that’s a sigh, and it’s your body’s built-in recovery mechanism. Sighs are not just emotional expressions; they serve a critical physiological purpose. Your lungs contain millions of tiny air sacs called alveoli, and during periods of shallow breathing, some of those sacs start to collapse. A sigh reopens them, restoring the lung’s ability to exchange oxygen and carbon dioxide efficiently.⁷

Sighs also act as a kind of reset button for breathing variability. When your breathing becomes too regular or too irregular, sighs help nudge it back toward a healthy middle range. They monitor changes in brain arousal states and can induce alertness, which is partly why you sigh more when you’re drowsy or bored.⁸ In other words, if your body briefly under-breathes while you’re focused on something else, the sigh mechanism catches the error and corrects it before oxygen levels drop meaningfully. This is one reason momentary lapses in breathing are usually harmless: you have a safety net.

When “Forgetting to Breathe” Becomes Dysfunctional Breathing

For some people, irregular breathing patterns while awake are not occasional quirks but a persistent condition. Clinicians call this dysfunctional breathing, an umbrella term for breathing patterns that are irregular enough to cause symptoms, either on their own or layered on top of existing lung or heart conditions.⁵ The symptoms often include breathlessness that seems out of proportion to activity, chest tightness, dizziness, tingling in the hands, and a frequent sense that you can’t get a full breath.

Researchers have proposed several subtypes of dysfunctional breathing. These include periodic deep sighing with an irregular breathing pattern, excessive use of abdominal muscles during exhalation, and a mismatch in the timing between rib cage and abdominal movement that makes breathing mechanically inefficient.⁹ The condition is best understood as a multidimensional problem involving biochemical changes (like low carbon dioxide from over-breathing), biomechanical problems (like poor diaphragm use), and the subjective experience of breathing-related symptoms.¹⁰

If you find that your breathing feels disrupted most of the day, or that you regularly feel dizzy, lightheaded, or unable to take a satisfying breath, these are signs worth bringing to a doctor. Occasional moments of noticing a breath pause don’t qualify. Persistent, symptom-producing irregularity does.

Medical Conditions That Genuinely Impair Awake Breathing

A small number of medical conditions can truly compromise the automatic breathing drive while you’re awake. The most dramatic is congenital central hypoventilation syndrome, sometimes called Ondine’s curse. People with this rare genetic condition have a defective brainstem breathing pacemaker. During sleep, when the voluntary cortex is offline, they can stop breathing entirely. During wakefulness, brain imaging reveals that these patients rely on the supplementary motor area of the cortex, a region normally involved in planning voluntary movements, to keep breathing going. Pre-inspiratory brain signals that indicate conscious effort appear in every breathing cycle for these patients, even during quiet rest, signals that are largely absent in healthy people.¹¹ In effect, they must use willpower to do something the rest of us do unconsciously.

Postural orthostatic tachycardia syndrome, known as POTS, is a far more common condition of autonomic dysfunction. Patients with POTS frequently report breathlessness and commonly demonstrate dysfunctional breathing patterns, including hyperventilation. A physiotherapy intervention targeting these patterns improved breathing regularity and breath-hold time in POTS patients.¹² If you have episodes of racing heart upon standing, fainting, or dizziness alongside your breathing concerns, POTS is worth discussing with your doctor.

Neurodegenerative diseases can also erode the brainstem’s respiratory control. In Parkinson’s disease, the protein deposits that damage dopamine-producing neurons can also affect the lower brainstem structures that regulate breathing. Researchers have found impaired responses to low oxygen levels even in early stages of Parkinson’s, and multiple mechanisms contribute: direct damage to medullary respiratory centers, loss of supporting brain cells called astrocytes in key breathing regions, and disruption of a signaling pathway running from the substantia nigra through to brainstem chemosensory areas.¹³ For most people worried about forgetting to breathe, Parkinson’s is not on the radar. But for those already diagnosed, breathing irregularities during the day are a recognized and underappreciated part of the disease.

How Voluntary and Automatic Breathing Interact During Speech

One of the most illuminating windows into how conscious and unconscious breathing coexist comes from studying conversation. When you talk, you don’t breathe on the brainstem’s schedule anymore. You breathe at the ends of phrases, during pauses, and before making a new point. Your cortex essentially takes over the timing of each breath, suppressing the automatic rhythm and inserting inhalations where they serve communication. Brain imaging during natural conversation turn-taking confirms that this involves coordinated activity across the cortex, cerebellum, and brainstem respiratory nuclei.³

This is relevant to the “forgetting to breathe” question because it demonstrates that your brain routinely overrides automatic breathing for extended periods without any harm. Every time you speak a long sentence, your automatic breathing rhythm is being suppressed. The brainstem network still monitors blood gas levels in the background and will force a breath if carbon dioxide climbs too high, which is why you can’t actually suffocate yourself by choosing not to breathe. The backup system is robust. What feels like “forgetting” is usually just the voluntary system holding the reins a bit longer than usual, with the automatic system standing ready to take over.

What You Can Do About It

If you occasionally notice a breath pause and it doesn’t come with other symptoms, the most useful response is reassurance: your body has multiple fail-safes, and brief pauses are part of normal breathing variability. That said, there are practical steps that help if the sensation bothers you or if you notice it happening often.

Check your posture: Sit upright with your shoulders back and your feet flat. This simple change gives your diaphragm more room to move and can reduce the shallow breathing that leads to sudden gasping.
Set breathing reminders: If you tend to hold your breath while working at a screen, a periodic reminder to take a slow, deliberate breath through the nose can interrupt the pattern before it becomes uncomfortable.
Practice diaphragmatic breathing: Place one hand on your chest and one on your belly. Breathe so that the belly hand moves outward while the chest hand stays relatively still. This retrains the pattern away from upper-chest breathing toward the more efficient diaphragm-driven breathing that your body defaults to during sleep.
Address anxiety if it’s driving hypervigilance: If you find yourself constantly monitoring your breathing and worrying about it, the breathing problem and the anxiety problem are tangled together. Breathing retraining that specifically targets carbon dioxide levels has shown improvements in anxiety symptoms for people with high baseline anxiety, with benefits lasting at least six months after treatment ended.¹⁴

For people whose breathing disruption is more than occasional, a comprehensive evaluation is worthwhile. Clinicians who specialize in dysfunctional breathing typically assess breathing symptoms, resting carbon dioxide levels, breathing patterns, and how breathing responds to physical and psychological challenges.¹⁰ This multidimensional approach matters because the cause of disrupted breathing varies from person to person: for some it’s primarily biomechanical, for others it’s biochemical, and for many it’s a mix driven partly by anxiety.

When Children “Forget” to Breathe

Parents sometimes notice their children holding their breath during concentration or emotional outbursts, which can be terrifying to witness. Breath-holding spells in young children, typically between six months and six years of age, are a well-known pediatric phenomenon. They usually occur during crying or frustration: the child exhales forcefully, then fails to inhale for long enough to turn pale or even briefly lose consciousness. These spells are involuntary and, while frightening, are considered benign and self-resolving in the vast majority of cases. The child’s brainstem will force a breath before any lasting harm occurs.

For older children or adolescents who describe consciously feeling like they forget to breathe, the same factors that affect adults apply: stress, posture, screen time, and anxiety. Congenital central hypoventilation syndrome, mentioned earlier, is typically diagnosed in infancy because the breathing failure during sleep is obvious from birth, so a child or teenager newly noticing occasional breath pauses almost certainly does not have this condition.

Why the Internet Makes This Feel Scarier Than It Is

Search engines are good at connecting people to worst-case scenarios. If you search “forgetting to breathe while awake,” you’ll quickly encounter information about central hypoventilation syndrome, brainstem lesions, and neurodegenerative diseases. These conditions are real, but they are also vanishingly rare compared to the mundane explanations: stress, posture, concentration, and heightened self-awareness. The very act of searching can feed a cycle where anxiety about breathing makes you monitor your breathing more closely, which makes normal pauses feel abnormal, which generates more anxiety.

Researchers who study the relationship between anxiety and breathing perception have noted exactly this pattern. Altered perception of breathing, not just altered breathing itself, is a hallmark of several anxiety disorders.⁶ If you’ve been breathing for your entire life without incident and only recently started noticing pauses, the most likely explanation isn’t that something broke. It’s that something shifted your attention inward, and now you’re noticing a process that was never meant to be watched. The brainstem network that generates your breathing rhythm has been doing this job since before you were born, across billions of breath cycles, and it has multiple redundancies built in to ensure it doesn’t simply stop.¹⁵ Your awareness of the gaps is new. The gaps themselves probably aren’t.

1
PubMed Central. Pre-Bötzinger complex: a brainstem region that may generate respiratory rhythm in mammals
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PubMed Central. Structural and functional architecture of respiratory networks in the mammalian brainstem
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PubMed Central. Central nervous system control of breathing in natural conversation turn-taking
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PubMed Central. Effect of Upright and Slouched Sitting Postures on the Respiratory Muscle Strength in Healthy Young Males
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PubMed Central. Dysfunctional breathing: what do we know?
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PubMed Central. The breathing conundrum-interoceptive sensitivity and anxiety
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PubMed Central. The psychophysiology of the sigh: I: The sigh from the physiological perspective
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PubMed Central. The integrative role of the sigh in psychology, physiology, pathology, and neurobiology
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European Respiratory Review. Dysfunctional breathing: a review of the literature and proposal for classification
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PubMed. Relationships between measures of dysfunctional breathing in a population with concerns about their breathing
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PLoS ONE. Does the Supplementary Motor Area Keep Patients with Ondine’s Curse Syndrome Breathing While Awake?
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PubMed. Breathlessness and dysfunctional breathing in patients with postural orthostatic tachycardia syndrome (POTS): The impact of a physiotherapy intervention
13
ERJ Open Research. Respiratory dysfunction in Parkinson’s disease: a narrative review
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PubMed Central. Biofeedback Training to Increase PCO2 in Asthma with Elevated Anxiety: A One-Stop Treatment for Both Conditions?
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PubMed Central. The multifunctionality of the brainstem breathing control circuit