What causes night terrors in children

Understanding Night Terrors in Children

Night terrors, also known as sleep terrors, are episodes of screaming, intense fear, and flailing that occur during sleep. They are a type of parasomnia, which are undesirable events or experiences that happen while a person is falling asleep, sleeping, or waking up. While they can be very distressing for parents to witness, night terrors are generally not harmful to children and are a normal part of development for many.

What Happens During a Night Terror?

During a night terror, a child may suddenly sit up in bed, scream, cry, thrash around, sweat profusely, and appear terrified. Their eyes may be open, but they are not typically aware of their surroundings and are difficult to rouse. They might also have rapid breathing and a fast heart rate. The episode usually lasts from a few minutes to about 30 minutes, after which the child usually falls back into a deep sleep and may not remember the event at all in the morning. This is a key difference from nightmares, which occur during REM sleep and are usually remembered.

Causes of Night Terrors

The exact cause of night terrors is not fully understood, but they are believed to be related to the immaturity of a child's central nervous system and their developing sleep-wake cycles. They occur during the deepest stage of non-REM sleep (slow-wave sleep), which typically happens in the first half of the night, about 1 to 3 hours after falling asleep. The transition between these deep sleep stages and lighter sleep or REM sleep is where these episodes can occur.

Several factors can trigger or increase the likelihood of night terrors:

• Sleep Deprivation: Not getting enough sleep is a common trigger. This can happen due to a late bedtime, interrupted sleep, or changes in sleep schedule.
• Stress and Anxiety: Significant life changes or stressful events, such as starting school, a new sibling, family conflict, or moving house, can contribute.
• Fever: A high temperature can disrupt sleep patterns and trigger night terrors.
• Disruptions in Sleep Schedule: Travel, jet lag, or even a change in routine can throw off a child's sleep cycle.
• Obstructive Sleep Apnea (OSA): In some cases, underlying sleep disorders like OSA, where breathing is repeatedly interrupted during sleep, can be a contributing factor.
• Restless Legs Syndrome (RLS): Discomfort in the legs leading to an urge to move can also disrupt sleep.
• Medications: Certain medications that affect the central nervous system might also play a role.

Who is Affected?

Night terrors are most common in children between the ages of 3 and 12 years old. They are less common in infants and adults. It is estimated that up to 4% of children experience night terrors. Boys may be slightly more prone to them than girls. If night terrors run in families, it suggests a genetic predisposition.

When to Seek Medical Advice

While night terrors are usually benign, it's advisable to consult a pediatrician if:

• The episodes are very frequent or severe.
• They are accompanied by other concerning symptoms, such as sleepwalking, difficulty breathing, or excessive daytime sleepiness.
• The child has a history of other sleep disorders or medical conditions.
• The night terrors are causing significant distress to the child or family.
• The child is having trouble waking up or seems confused for extended periods after an episode.

A doctor can rule out other potential causes and provide guidance on management strategies.

Managing Night Terrors

Management focuses on ensuring safety and improving sleep hygiene:

• Do not try to wake your child: Attempting to wake a child during a night terror can often make them more agitated and confused. Instead, stay calm, speak in a soothing voice, and gently guide them back to bed if they are moving around. Ensure their environment is safe by removing any potential hazards.
• Ensure adequate sleep: Establish a consistent bedtime routine and ensure your child is getting enough sleep. Avoid over-scheduling activities that might lead to fatigue.
• Address stressors: If stress or anxiety seems to be a factor, talk to your child about their worries and try to create a calm and secure environment.
• Scheduled Awakenings: For very frequent night terrors, a technique called scheduled awakenings may be recommended. This involves waking the child briefly about 15-30 minutes before the terror typically occurs, disrupting the sleep cycle slightly. Consult a doctor before trying this.
• Treat underlying conditions: If sleep apnea or another medical condition is identified, treating it can reduce the frequency of night terrors.

Most children outgrow night terrors as their sleep patterns mature. By focusing on good sleep hygiene and managing potential triggers, parents can help their children navigate this common childhood sleep phenomenon.