Sleepwalking, or somnambulism, is a parasomnia in which a person gets up or performs behaviors while still partly asleep. It most often arises from deep non-REM sleep and is more common in childhood, though it can also occur in adults. During an episode, the person may appear awake but is not fully conscious and may have little or no memory of the event afterwards. ^[1][2][3]

Overview

Sleepwalking exists on a spectrum. Some people simply sit up in bed or mumble, while others walk through the house, open doors, eat, or perform more complex actions. Because awareness is incomplete, judgment and reaction are impaired during the episode. ^[1][2]

Symptoms

Common features include getting out of bed, staring, slow or clumsy movement, poor response to conversation, confusion if awakened, and complete or near-complete amnesia for the event the next day. Episodes often occur in the first third of the night when deep sleep is more prominent. ^[1][2]

Causes and risk factors

Sleep deprivation, irregular sleep schedules, fever, stress, some medications, alcohol, and a family history of parasomnias can increase risk. In adults, recurrent sleepwalking may also be linked to other sleep disorders, mental health stressors, or rarely seizures or neurologic conditions, so the context matters. ^[1][2][3]

Diagnosis

Diagnosis is usually clinical, based on the history and witnessed behavior. Additional testing is considered when episodes are frequent, dangerous, atypical, begin in adulthood, or raise suspicion of another condition such as nocturnal seizures, REM sleep behavior disorder, or sleep apnea. ^[1][2]

Treatment options

The first priorities are sleep regularity and environmental safety. Many childhood cases improve over time and may not need medication. Selected patients benefit from treating triggers such as sleep deprivation or sleep apnea. Medication is reserved for specific situations and should be guided by a clinician. ^[1][2][3]

Complications and follow-up

The main risk is injury. Falls, collisions, wandering outside, or unsafe behaviors around stairs, windows, or kitchens can occur. Recurrent adult sleepwalking may also affect relationships, work, and anxiety levels, especially when the episodes become unpredictable. ^[1][2]

When should a doctor be consulted?

Medical evaluation is recommended if episodes are frequent, injurious, newly starting in adulthood, unusually complex, associated with violent behavior, or accompanied by daytime sleepiness or other signs of a sleep disorder. ^[1][2]

Living with the condition and monitoring

Home safety can include locking doors and windows, clearing obstacles, using gates or alarms if appropriate, and avoiding top bunks. Family members should know that the person is not fully awake and that calm redirection is often safer than confrontation. ^[1][2]

Prognosis and follow-up

Many children outgrow sleepwalking. In adults, prognosis depends on the underlying cause and whether triggers can be identified and addressed. Ongoing follow-up is useful when the condition is severe or safety remains a concern. ^[1][2]

FAQ

Is a sleepwalking person fully awake?

No. The person is in a partial arousal state and is not fully aware or fully responsive. ^[1][2]

Should I wake a child who is sleepwalking?

Often it is better to guide the child gently back to safety rather than trying to force full awakening, which may increase confusion. ^[1][2]

Is adult sleepwalking important?

Yes. New or persistent adult sleepwalking deserves attention because it may be linked to triggers or another disorder. ^[1][2]

Is sleepwalking permanent?

Not always. Many childhood cases improve, while adult outcomes depend more on the underlying cause. ^[1][2]

What is the most important precaution?

Environmental safety is crucial to reduce the risk of injury during an episode. ^[1][2]