"I never dream." We hear this statement all the time. And yet, scientific logic is unequivocal: every human being goes through phases of intense dream activity every night, whether they remember them or not. So why do some sleepers truly feel as though no images, no thoughts, and no nighttime desires pass through their sleep? The answer to this mystery lies in the way the brain encodes or forgets its own unconscious creations.
Everyone dreams: a scientific certainty
Producing dreamlike experiences is neither a talent nor a unique trait; it is a universal biological function. Understanding why we dream begins with understanding how sleep works. During sleep, the human brain goes through several 90-minute cycles that alternate between light sleep, deep sleep, and REM ( Rapid Eye Movement) sleep. It is during these REM phases that the vast majority of dream activity occurs—those sequences of images, thoughts, and emotions that the unconscious mind constructs in the absence of external stimulation.
A full night’s sleep includes between four and six REM sleep phases. Sleepers therefore experience one to two hours of dreaming each night—often more. This is not a possibility; it is a documented physiological reality. Polysomnography studies consistently confirm this: when awakened during an REM phase, people who claim they “never dream” report having dreams in the vast majority of cases. Imagine the surprise of these people as they reevaluate their own relationship with sleep upon waking up in the laboratory.
Dream Amnesia: Why We Forget Our Dreams
While everyone experiences dreams, the real mystery lies elsewhere: why do some sleepers remember them upon waking, while others do not? The answer lies in a well-documented phenomenon in neuroscience: dream amnesia.
During sleep, the hippocampus—the region of the brain responsible for memory formation—is partially deactivated. Dream activity occurs, but its encoding into long-term memory is limited or nonexistent. Imagine a movie being shown in a theater without a recording device: the reality of the movie exists—it plays out in vivid dreams—but no trace of it remains once the screening is over. This fascinating phenomenon—which can sometimes be frustrating for those who wish to retain their dreams—lies at the heart of human dream life.
Whether or not a dream experience is remembered depends mainly on the timing of waking up. Sleepers who wake up naturally during or just after a REM phase have a window of a few minutes to consolidate their dream memories. Those who are abruptly awakened—by a loud alarm or while in deep sleep—“miss” this window and retain nothing. The nocturnal realities of their brains remain inaccessible to their waking consciousness.
Factors That Influence the Memory of Dream Experiences
Stress and Cortisol
A stressed brain produces more cortisol, a hormone that often interferes with nighttime memory consolidation. Stressed sleepers experience just as much dream activity as others, but they are more likely to forget their dreams upon waking. This phenomenon also explains why we often remember our dreams better during vacations, when the brain—under less strain—can devote more energy and attention to its nighttime activity upon waking. Chronotype also plays a role: an early riser who naturally wakes up at the end of the REM phase will tend to remember their dreams better than a night owl forced to wake up by a morning alarm.
Alcohol and Medications
Alcohol consumption disrupts REM sleep phases. Even in moderation, it reduces the duration and quality of REM cycles, thereby diminishing the production and retention of dream experiences. Studies conducted on French individuals undergoing alcohol withdrawal have shown an intense “REM rebound,” often accompanied by very vivid dreaming, nightmares, and sometimes sleepwalking. Certain antidepressants, sleeping pills, and beta-blockers also alter sleep architecture and may suppress or reduce REM phases, leaving sleepers with the impression—sometimes hard to believe even to themselves—that they have not experienced any dream activity.
Personality and Attention to Inner Life
People who value their unconscious mind, who practice meditation, or who keep a dream journal generally have a better memory of their nighttime experiences. It’s no mystery: the attention paid upon waking reinforces the consolidation of what we experienced in our dreams. The desire to remember is itself a key factor in what dream researchers sometimes call “dream intention.”
Is it really possible to never dream? Real-life cases
There are rare and remarkable cases in which people exhibit a significant reduction or near absence of remembered dream activity. Brain lesions affecting certain specific regions can reduce or eliminate dream experiences. This is known as “dream cessation,” a phenomenon studied in neurology whose clinical realities are still only partially understood.
Sleepwalking, although different in nature, is often associated with a disruption in the transition phases between deep sleep and REM sleep. Sleepwalkers often question their own relationship to the world of dreams; they find themselves in an intermediate state between waking reality and dreaming, where dream consciousness is blurred and memories are fragmentary. Some might even confuse their episodes of sleepwalking with lucid dreams.
The mysteries of dreaming may also lie in individual biological variations that are still poorly understood. Why do some people seem to have more vivid dreams, while others experience seemingly empty nights? Scientific reasoning points to individual brain architecture, the volume of the hippocampus, and the sensitivity of memory consolidation networks—incredible neurological realities that are still being explored.
Is it a cause for concern if you don't remember your dreams?
No. The absence of dream recall is not, in and of itself, a sign of a mental health disorder or problem. No one should worry about not remembering their dreams upon waking; it is a normal phenomenon, often influenced by lifestyle habits rather than by a medical condition.
On the other hand, if you feel like you’re not sleeping well, wake up exhausted despite getting enough sleep, or if your dream memories have suddenly disappeared after starting a new medication, it may be helpful to talk to a professional. These symptoms could indicate an underlying sleep disorder—such as sleep apnea or fragmented sleep cycles—that warrants medical attention. The mysteries of sleep sometimes reflect actual physiological realities that only a specialist can interpret.
How to Remember Your Dreams Better
For those who would like to keep track of their dreams, a few simple habits can often make an incredible difference. We’ve put together a comprehensive guide on how to remember your dreams when you wake up —here are the key points.
Kipli, of course.