Sleep and Dreaming Why Can't I Remember My Dreams When I Wake Up? By Brandon Peters, MD Brandon Peters, MD Facebook Twitter Brandon Peters, MD, is a board-certified neurologist and sleep medicine specialist. Learn about our editorial process Updated on October 13, 2022 Medically reviewed Verywell Mind articles are reviewed by board-certified physicians and mental healthcare professionals. Medical Reviewers confirm the content is thorough and accurate, reflecting the latest evidence-based research. Content is reviewed before publication and upon substantial updates. Learn more. by Armeen Poor, MD Medically reviewed by Armeen Poor, MD Armeen Poor, MD, is a board-certified pulmonologist and intensivist. He specializes in pulmonary health, critical care, and sleep medicine. Learn about our Medical Review Board Print istockphoto / Getty Images Table of Contents View All Table of Contents What Is a Dream? Normal Patterns of Dreaming Why Dreams May Be Forgotten How to Better Remember Dreams If you wake in the morning feeling disappointed that you don’t recall any dreams that you had overnight, you might question: Why can’t I remember my dreams? Learn about the nature of dreams, the association of vivid dreams with rapid eye movement (REM) sleep, normal sleep patterns and the pattern of dreaming, triggers of dream recall like untreated sleep apnea, and how you might learn to better remember your dreams. 1:49 7 Theories on Why We Dream Simplified What Is a Dream? The frequency of dream recall may vary or even fade at points in one’s life. A dream is a series of thoughts, images, or sensations that occur in the mind during sleep. It is a function of the brain. Dreaming may occur as specific regions of the brain are activated through sequenced electrical patterns and chemical activity. Vivid dreams—like a movie that occurs with you as the actor—are associated with rapid eye movement (REM) sleep. This state of sleep was first discovered by William Dement, MD, PhD, considered the father of sleep medicine. REM is associated with intense activity within the brain. In fact, the brain uses as much energy (and glucose) in REM as it does during wakefulness. The muscles controlling the eyes are active, as is the diaphragm that is responsible for breathing. The rest of the body’s major skeletal muscles are paralyzed during this state. This prevents the acting out of dreams from occurring (and abnormalities of its regulation account for both sleep paralysis and REM sleep behavior disorder). The exact purpose of dreaming is still being examined. It seems to have an important role in memory consolidation, including the elimination of irrelevant daytime experiences. It also is important to learning and problem-solving. It is possible to experience fragmentary dreams in non-REM sleep. This includes the lighter stages of sleep (called stage 1 and stage 2) and slow-wave sleep (called stage 3). It is believed that the dream content of non-REM is more simplistic. It may be the dream of an image, an idea, or a concept that is more static. If REM-related dreams are a movie, non-REM dreams may be likened to a photograph. The nature of dreams and their specific meaning has been a subject of interest for millennia. The famous neurologist and founder of psychiatry, Sigmund Freud, explored the topic in his seminal work from 1900, The Interpretation of Dreams. There is no consensus on the scientific basis for the interpretation of dream content. Reflection and derivation of meaning may be best reserved as a personal exercise. Normal Patterns of Dreaming It is normal to dream, but it is common to not recall the dreams that occur. The dreaming state can be identified by measurements made as part of a diagnostic polysomnogram, including the recording of the: Electroencephalogram (EEG)Ectrooculogram (EOG)Electromyogram (EMG) The tell-tale signs of REM sleep include an active brain, rapid eye movements, and a loss of muscle tone. REM sleep occurs at intervals throughout the night. The first period of REM may be 90 to 120 minutes into the night. If it occurs early, in less than 15 minutes, this may be a sign of narcolepsy. REM periods become more prolonged towards morning. As a result, the last third of the night may include mostly REM sleep. It is common to wake in the morning out of the last period of REM. Just because they are not recalled, the dreams associated with REM sleep are likely still occurring. There may be variability night-to-night and across the lifespan. Why Dreams May Be Forgotten There are a few possible explanations for dreams that cannot be remembered. Some of these reasons include: Less REM Sleep First, it is possible that REM sleep is not occurring (or at least not occurring as much as normal). Medications may suppress REM sleep. In particular, antidepressants seem to have a powerful influence by delaying the onset or reducing the amount of REM sleep. Alcohol may also act as a REM sleep suppressant, at least until it wears off. If REM sleep is occurring, the vivid dreams that are associated with it may not be recalled. If there is a transition from REM sleep to another state of sleep (most often stage 1 or stage 2), prior to recovering consciousness, the dreams may be forgotten. Dreams Often Fade Upon Waking As a general rule, dreams fade quickly after waking. The electrical signals and chemical signatures that constitute the experience of the dream may disappear as wakefulness ensues, like a message written on a fogged mirror that vanishes as the steam evaporates. It is possible for elements of the dream to be recalled later in the day, perhaps triggered by an experience that reactivates the same area of the brain that created the dream overnight. Particularly memorable dreams may create an impression that persists for decades. Recounting the dream to another person may help to stabilize the memory. Dreams (or nightmares) that are associated with intense emotions, including fear, may also stick in the mind. The amygdala is an area of the brain that may help to elicit these emotion-laden dreams. Why am I remembering my dreams lately? If you suddenly remember your dreams more than usual, it might be due to fragmented REM sleep. Alarm clocks notoriously interrupt REM sleep towards morning. Other causes of fragmented sleep that might cause you to remember your dreams include sleep apnea, limb movements, or snoring. It is even possible to fall asleep and re-enter the same dream experience repeatedly. Sleep Disorders Sleep disorders may impact dream recall. Untreated obstructive sleep apnea may also contribute to fragmented REM sleep as disturbed breathing occurs due to relaxation of the airway muscles. For some, this may lead to increased dream recall (including dreams of drowning or suffocation). Sleep apnea may likewise lead to REM sleep deprivation and effective CPAP therapy may cause a profound rebound of REM sleep. People with narcolepsy also experience sudden sleep transitions that contribute to dream recall, sleep-related hallucinations, and sleep paralysis. Poor sleep habits, stress, and psychiatric conditions may also fragment sleep and increase dreaming and recall. How to Better Remember Dreams If you are interested in improving your dream recall, consider a simple change: keep a dream journal. By keeping a pen and a notebook on the nightstand next to the bed, it becomes easy to quickly record dreams immediately upon awakening, before they have had a chance to fade. Writing down your dream may encourage improvements in dream recall. If the scribbled notes can be interpreted later in the morning, it may be possible to reflect on the meaning of your dreams. A Word From Verywell Dreams are a fascinating part of sleep. Though you may feel distressed by not remembering dreams, rest assured that this state of sleep is likely still occurring. The benefits yielded, from memory processing to learning and problem solving, are likely just below the surface of awareness. As you fall asleep, imagine a world that might be, and it may come to you in the night. 10 Sources Verywell Mind uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy. Dement W, Kleitman N. The relation of eye movements during sleep to dream activity: an objective method for the study of dreaming. 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Elsevier; 2014:251-271. doi:10.1016/B978-0-7020-4086-3.00018-7 Schredl M. Dreams in patients with sleep disorders. Sleep Med Rev. 2009;13(3):215-21. doi:10.1016/j.smrv.2008.06.002 By Brandon Peters, MD Brandon Peters, MD, is a board-certified neurologist and sleep medicine specialist. See Our Editorial Process Meet Our Review Board Share Feedback Was this page helpful? Thanks for your feedback! What is your feedback? Other Helpful Report an Error Submit Speak to a Therapist Online Advertiser Disclosure × The offers that appear in this table are from partnerships from which Verywell Mind receives compensation.