Parasomnias: symptoms, diagnosis and treatment

Talking, shouting, getting out of bed, eating, or even hitting the person sleeping next to you without being aware of what is happening. If any of these situations sound familiar, you may be experiencing parasomnias, a group of sleep disorders that frighten both those who experience them and those who observe them.

The good news is that many parasomnias have an explanation, a clear diagnosis, and effective treatments. With the right help, it's possible to sleep safely again and significantly reduce these nighttime episodes. In some cases, seeking a specialist evaluation is necessary. sleep therapy It's the step that makes the difference between chaotic nights and a peaceful sleep.

What are parasomnias?

Parasomnias are unwanted behaviors, movements, or sensory experiences that occur when falling asleep, during sleep, or upon waking. It's not just about "dreaming a lot" or having restless sleep: we're talking about episodes where a person may talk, walk, shout, eat, have very vivid dreams, or experience paralysis, without conscious control of what is happening.

According to the International Classification of Sleep Disorders (ICSD-3), parasomnias are organized into three main groups: NREM sleep-related, sleep-related, and sleep-related. REM sleep and other parasomnias. This classification helps to understand in which sleep phase the episodes occur and what type of treatment is most appropriate.

Parasomnias are very common in children and, in most cases, tend to decrease with age. In adults, however, they may be associated with intense stress, other sleep disorders, or neurological diseases, so they should not be ignored, especially when episodes are repeated, violent, or pose a risk of falls or trauma.

Types of parasomnias and practical examples

Not all parasomnias are the same. Some involve complex motor behaviors, such as walking around the house, while others manifest as excessively vivid dreams, recurring nightmares, or strange sensations upon waking. Knowing the main types helps to recognize what is happening during the night.

NREM sleep parasomnias

These parasomnias typically occur in the first part of the night, starting from deep NREM sleep, when the brain gets "stuck" between sleep and wakefulness. The most common are:

• • Confusional awakenings – The person sits up in bed, seems confused, speaks slurredly, may sweat, and look around without quite recognizing what is happening. It is difficult to fully "bring them back to wakefulness," and the next day they often don't remember the episode.
  • Sleep-walking – The person gets out of bed and walks, may open doors, touch objects, or even leave the house. They keep their eyes open, but do not respond appropriately, and usually have amnesia for what happened. sleep-walking It is typical in childhood, but it can persist into adulthood and involve a risk of falls or injuries.
  • Night terrors – Episodes of screaming, intense crying, great fear, and motor agitation. The person may sit up in bed, sweat, have a very fast heartbeat, and look frightened, but without recognizing who is trying to calm them down. It is more common in children and usually leaves no trace the next day.
  • Sleep-related eating disorder – Getting up to eat during the night, often consuming strange foods or unusual amounts, with no clear memory of the episode the following morning.

REM sleep parasomnias

These parasomnias occur during the REM phase, associated with the most vivid dreams. The problem here is that the boundary between dreaming and the body doesn't always remain stable.

• • Recurring nightmares – Intense and distressing dreams that awaken the person in a state of terror or anxiety, with a clear recollection of their content. When they are very frequent and disturbing, they can constitute a true sleep disorder.
  • REM sleep behavior disorder Instead of being "paralyzed" during sleep, the body begins to act out what is being dreamed. The person may punch, kick, scream, or jump out of bed, putting themselves and their sleeping partner at risk. In older adults, this condition may be associated with neurological diseases, so careful evaluation is required.
  • Recurrent isolated sleep paralysis – When falling asleep or waking up, the person realizes they are awake but cannot move their body or speak. They may feel pressure in their chest, a sense of presence in the room, or frightening images. Although very distressing, it is generally benign, although it can be associated with... sleep deprivation or intense stress.

Other parasomnias and related phenomena

There are also parasomnias that don't fit directly into the previous categories, but which can also disrupt sleep and well-being.

• • Bruxism of sleep – Grinding or clenching your teeth while sleeping, often accompanied by tooth wear, morning headaches, and jaw tension.
  • Nocturnal enuresis – Repeated episodes of bedwetting during sleep, beyond the age at which urinary control would be expected.
  • Exploding head syndrome – A sudden sensation of hearing a very loud noise, like an explosion, when falling asleep or waking up, without any real sound in the environment. It does not cause physical harm, but it can generate fear and difficulty falling back asleep.
  • Sleep-related hallucinations – Very vivid images, sounds, or tactile sensations when falling asleep or waking up. When they appear in isolation, they are often linked to sleep deprivation or very irregular sleep schedules.

Symptoms of parasomnias

The symptoms of parasomnias vary depending on the type, but they have one thing in common: the person has no control over what happens and often doesn't even remember the episode. The impact is felt both at night and throughout the day.

During the night, it is common to observe:

• Talking, shouting, crying, or laughing during sleep.
• Getting out of bed, walking, or performing complex movements without full awareness.
• Symptoms of intense fear, sweating, rapid heartbeat, or shortness of breath.
• Sudden, sometimes aggressive, movements of the arms and legs.
• Episodes of transient paralysis when falling asleep or waking up.
• Nighttime eating behaviors with no subsequent memory.

During the day, it's common to experience consequences such as tiredness, drowsiness, difficulty concentrating, irritability, fear of falling asleep, and intense worry about what might happen at night. In some cases, there's shame in sharing the problem for fear of being misunderstood.

Causes and risk factors of parasomnias

Parasomnias do not have a single cause. In many cases, they combine an individual predisposition with triggering factors related to lifestyle, emotional state, or other medical conditions. Among the main risk factors are:

• Age Many episodes occur in childhood and adolescence, especially sleepwalking, night terrors, and confusional arousals.
• Family history Having family members with parasomnias increases the likelihood of also experiencing them.
• Sleep deprivation and irregular schedules – Sleeping too little, going to bed and waking up at very different times, or working shifts favors episodes, especially in NREM parasomnias.
• Stress, anxiety and psychological trauma Intense emotional factors can worsen nightmares, sleep paralysis, and other nocturnal behaviors.
• Medicines and substances Some antidepressants, anxiolytics, stimulants, alcohol, or recreational drugs can trigger or worsen parasomnias.
• Neurological and psychiatric diseases In adults, certain parasomnias, such as REM sleep behavior disorder, may be associated with neurodegenerative diseases.
• Other sleep disorders – Conditions such as sleep apnea Periodic limb movements fragment sleep and increase the likelihood of partial awakenings with abnormal behavior.
• Disrupted biological rhythms – Changes to circadian rhythms, Frequent jet lag or abrupt changes in sleep schedules can trigger episodes, especially in those who are already vulnerable.

Parasomnias commonly arise in the context of other, more comprehensive sleep problems. A comprehensive assessment of sleep disorders It helps to identify the root cause of the episodes and to guide treatment in an integrated way.

Diagnosis of parasomnias

The diagnosis of parasomnias almost always begins with a good conversation. The healthcare professional will want to know exactly what happens during the night: who observes it, at what time it occurs, how long it lasts, how often, and if there is any later recollection. In general, the evaluation process includes:

• Detailed medical history – Characterization of the episodes, onset of symptoms, impact on daily life, medication in use, alcohol or other substance use, as well as medical and neurological history.
• Account from someone who witnessed the events. Partners, family members, or roommates are often crucial, as the patient rarely has full awareness of what is happening during sleep.
• Sleep diary – Keep a record, for several weeks, of the times the child goes to bed and wakes up, naps, nighttime symptoms, and factors that may trigger attacks.
• Video polysomnography (sleep study) – A test that records sleep over the course of a night, including brain waves, breathing, movements, and video recording, particularly useful in atypical cases, violent episodes, suspected nocturnal epilepsy, or REM sleep behavior disorder.
• Additional tests – Tests, neurological exams, or urological evaluations may be requested, depending on the type of parasomnia involved.

In most cases, specialists are able to reach a diagnosis based on the clinical history and reports of episodes. Video polysomnography is reserved for situations where it is necessary to confirm the type of parasomnia, rule out other diseases, or document risky behaviors during sleep.

Treatment of parasomnias

The treatment of parasomnias has three main objectives: to ensure the safety of the person and their sleeping partner, to reduce the frequency and intensity of episodes, and to treat associated causes, when present.

1. Safety first

Before considering medication, it is essential to adapt the sleep environment to reduce the risk of accidents, especially in cases of sleepwalking, REM sleep behavior disorder, or intense night terrors.

• • Remove unstable furniture, sharp objects, and slippery rugs from the room.
  • Use a low bed or mattress on the floor in cases of high risk of falling.
  • Close windows and balcony doors, and install additional latches if necessary.
  • Avoid sleeping too close to stairs or hazardous areas.
  • For children, ensure secure bed rails and remove hard or heavy toys.

2. Sleep hygiene and consistent routines

Many parasomnias worsen when a person is exhausted or has chaotic schedules. Improving overall sleep quality is, in itself, a form of treatment. A solid sleep plan is essential. sleep hygiene It usually includes:

• • A relatively fixed schedule for going to bed and waking up, including weekends.
  • Avoid bright screens and intense mental work in the hour before bedtime.
  • Limit caffeine, nicotine, and alcohol, especially at the end of the day.
  • Create a relaxing ritual (light reading, warm bath, slow breathing).
  • Make sure the room is dark, quiet, and at a comfortable temperature.

3. Psychological therapies and specialized support

When parasomnias are associated with stress, anxiety, trauma, or difficulty switching off at night, specific psychological strategies can make a big difference. Techniques such as cognitive behavioral therapy, Relaxation training, anxiety management, or reprocessing traumatic memories can help reduce nightmares, sleep paralysis, and other nighttime behaviors related to emotional state.

In many cases, structured follow-up in sleep therapy It allows these approaches to be integrated and the plan adapted to each person's needs, in coordination with their attending physician.

4. Medication: when it may be necessary

Not all parasomnias require medication. However, in situations where there is a risk of injury, intense suffering, or failure of behavioral measures, a doctor may consider medication. pharmacotherapy. In selected cases, drugs such as certain benzodiazepines or other medications may be used. melatonin, among others, especially in REM sleep behavior disorder and in some cases of nightmares or night terrors.

It is essential that any medication is always prescribed and monitored by a doctor, since some drugs can increase daytime sleepiness, interfere with other illnesses, or even worsen certain sleep disorders if used indiscriminately.

Practical strategies for managing parasomnias

Beyond formal treatment, there are small strategies that help to regain a sense of control over sleep and reduce the impact of these episodes on daily life.

• Write down the episodes, times, possible triggers, and how you feel the next day.
• Share the problem with the person you sleep with so they know how to react and don't get scared.
• Avoid abruptly waking someone in the middle of a sleepwalking or night terror episode; instead, calmly guide them back to bed, if it is safe to do so.
• Work on managing stress throughout the day, not just at night.
• Coordinate with a healthcare professional to develop a clear plan for higher-risk situations, such as very violent episodes.

When to seek specialized help for parasomnias

Not every isolated nightmare requires consultation. However, there are warning signs that justify evaluation by a sleep medicine doctor, neurologist, psychiatrist, or psychologist with sleep expertise:

• Frequent incidents in which there is a real risk of falling, accidental assault, or other injuries.
• Complex behaviors during sleep, such as driving, cooking, or leaving the house.
• Sleep paralysis or very distressing and repeated hallucinations.
• Intense daytime sleepiness, fall asleep easily During the day or while driving.
• Changes in behavior, memory, or mood associated with nighttime episodes.
• Recent onset of parasomnias in adulthood, especially if other neurological or psychiatric disorders are present.

Given these signs, there's no point in delaying. A structured assessment, possibly integrated into sleep therapy programs, allows for the differentiation of benign situations from conditions that require further investigation, including sleep studies and other examinations.

Conclusion

Living with parasomnias can be frightening. A person may feel like they "lose control" during the night, feel ashamed of what happens, and spend the day tired, anxious, and afraid to go to bed. However, today we know that these episodes are not "quirks" or psychological weakness: they are well-described sleep disorders with physiological explanations, diagnostic criteria, and increasingly effective treatment approaches.

By better understanding what parasomnias are, recognizing the symptoms, identifying triggers, and knowing when to seek help, you take the first step towards regaining the safety and quality of your rest.

If you feel your sleep has become unpredictable, consider seeking professional help: with the right approach, it's possible to transform nights filled with fear into much calmer and more restorative ones.