Miya Pearson
It's not uncommon for babies and toddlers to laugh in their sleep. While it's usually harmless, it can sometimes be a cause for concern. Laughing in sleep typically occurs during REM sleep, when most dreaming happens, and babies and toddlers spend more time in this stage than adults. It could be that your 2-year-old is simply dreaming or that they're responding to an internal impulse or reflex. In rare cases, it could be a sign of gelastic seizures, sleep apnea, or REM sleep behavior disorder.
| Characteristics | Values |
|---|---|
| Occurrence | Common |
| Age | From a few months old to 2.5 years old |
| Cause | Could be a reflex, dreams, or spiritual reasons |
| Type of sleep | REM sleep |
| Duration | Short and transient |
| Frequency | Occasional |
| Interference with sleep | Minimal |
| Accompanying signs | Vacant stare, grunting, unusual bodily movements, squirming |
| Diagnosis | EEGs, other diagnostic tests |
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What You'll Learn
Laughing in sleep is common and harmless
It is very common for babies to laugh and smile in their sleep. In fact, according to the American Academy of Pediatrics, most babies smile in their sleep before they smile while awake. This is likely a reflex and a part of normal development, often a precursor to their first real smile and first real laugh. The older the baby gets, the more you might see them mimicking facial expressions.
During REM sleep, a baby's brain activity is similar to an adult's, and dreaming occurs. Unlike adults, babies only stay in this stage for about 5-10 minutes at a time. Laughing in your sleep usually happens during REM sleep, although it can also occur during non-REM sleep. A study conducted among adults showed that nine out of ten patients exhibited sleep laughing during REM sleep, and the same may be true for babies.
Babies sleep differently than adults, in short cycles that alternate between active and quiet periods. During the active periods, you may notice your baby's eyes fluttering or arms and legs twitching. This is normal. Newborns sleep a lot, up to 17 hours a day, but they can't stay asleep for long periods. They sleep for only 2-3 hours at a time before they need to eat again.
In rare cases, laughter during sleep can be a sign of something more serious, such as gelastic seizures or REM sleep behaviour disorder. However, these conditions are very uncommon. Gelastic seizures cause people to laugh uncontrollably and can start in infancy, but they are exceptionally rare, occurring in only 0.005% of people. REM sleep behaviour disorder is when the paralysis of limbs doesn't occur during REM sleep, and the person acts out their dreams physically.
Overall, laughing in sleep is usually a harmless and common occurrence, often bringing curiosity and joy to parents. It is not something to worry about unless it is frequent and interfering with your child's sleep or accompanied by other concerning symptoms.
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It could be a reflex or a seizure
It is very common for babies to laugh and smile in their sleep. In most cases, it is a reflex or part of their normal development. This usually happens during REM sleep, which is when most dreaming occurs. Babies under 6 months likely don't dream, so their sleepy smiles and giggles are probably a reflex.
Babies have a wide range of involuntary reflexes, such as the Moro reflex, which causes them to suddenly extend their arms and legs when they hear a loud sound. Similarly, when a baby hears a loud noise while sleeping, they might smile or laugh as a reflex. These early smiles and laughs help develop their facial muscles and prepare them for their first real social smile, which usually happens around 2 months of age.
However, in rare cases, laughter during sleep can be a sign of gelastic seizures, a type of seizure that causes uncontrollable laughter. These seizures are often associated with a rare form of epilepsy and can be challenging to diagnose. They are caused by a noncancerous mass in the hypothalamus, a part of the brain that controls essential functions like hormone and temperature control. Gelastic seizures usually last for 2 to 30 seconds and can occur dozens of times a day. The laughter may sound forced, unnatural, hollow, or mechanical, and it is not linked to any happiness or joy. If you suspect your child is experiencing gelastic seizures, it is important to consult a doctor for a proper diagnosis and treatment.
In summary, while it is typically a reflex or a normal part of development for a 2-year-old to laugh in their sleep, in rare cases, it could be a sign of gelastic seizures. If you are concerned or notice any abnormal behaviour, it is always best to consult a healthcare professional.
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Dreams, spiritual beliefs, and joy are other reasons
Across different cultures, a baby laughing in their sleep is considered a sign of divine interaction or spiritual intimacy. Some spiritual beliefs hold that angels might communicate with babies in their sleep, prompting laughter. Other interpretations suggest that babies are capable of seeing heaven or remembering it, as they have recently arrived from the spiritual realm. Their laughter could reflect these joyous visions.
From a spiritual perspective, a baby's laughter in sleep is also seen as a manifestation of pure soul-level joy, untainted by the complexities of the physical world. While these interpretations are based on spiritual beliefs rather than scientific evidence, they enrich the narrative of our experiences as parents and deepen the bonds we feel with our children.
Creating an ideal sleeping environment can promote more restful sleep and, perhaps, more delightful laughs. Using blackout curtains to create a dark and calm atmosphere can significantly improve sleep quality and maintain a consistent sleep schedule. Keeping the room cool and comfortable, between 68-72°F (20-22°C), is ideal for a baby's sleep.
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It might be a sign of autism or another disorder
It's important to note that laughing during sleep is a common occurrence in babies and toddlers and is usually nothing to worry about. In most cases, it is simply a reflex or a part of their development as they prepare to exhibit true intentional social smiles and laughs.
However, in rare instances, sleep laughter can be a sign of autism or another disorder. Autism is associated with socially inappropriate laughter, and laughing during sleep may be considered inappropriate by some. Additionally, individuals on the autism spectrum may laugh at random times or for extended periods, which could include sleep.
Neurodevelopmental disorders like autism spectrum disorder (ASD) have been linked to sleep laughing in babies and toddlers. The central nervous system is not fully developed at this age, making it challenging to determine if sleep laughter is due to a disorder. If your toddler exhibits other signs of ASD or you have concerns about their development, it is essential to consult a healthcare professional for evaluation and guidance.
In very rare cases, sleep laughter could indicate gelastic seizures, which are short seizures lasting around 10 to 20 seconds. These seizures can cause uncontrollable laughter and typically occur as the child is falling asleep or during sleep, sometimes waking them up. If you notice frequent episodes of sleep laughter accompanied by vacant stares, unusual bodily movements, or if it interferes with your toddler's sleep, it is important to consult a pediatrician.
While less common, sleep laughter can also be associated with REM sleep behavior disorder. This disorder involves acting out dreams physically, which may include laughing, shouting, or talking. It is often associated with other neurological disorders. If you observe additional signs of sleep disturbances or unusual behaviors during sleep, it would be advisable to seek professional advice.
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Tips to help your child sleep better
It is very common for babies to laugh in their sleep, and this is usually nothing to worry about. It is often a reflex or a part of their development as they get ready for their first real social smile and laugh. However, in rare cases, it could be a sign of gelastic seizures, especially if the laughter occurs as they are falling asleep or if it wakes them up. If you are concerned, speak to your baby's healthcare provider.
Develop a bedtime routine
A regular bedtime routine starting at the same time each night encourages good sleep patterns. A bedtime routine of a warm bath, reading a book, and dimming the lights can help younger children feel ready for sleep. For older children, the routine might include quiet chatting, turning off digital technology, having a shower, listening to music, or reading.
Wind down before bedtime
Encourage your child to wind down before bedtime. Older children might like to relax by reading a book, listening to gentle music, or practising breathing exercises. If your child takes longer than 30 minutes to fall asleep, they might need a longer wind-down period before turning off the lights.
Make your child feel safe
If your child feels scared of the dark or going to bed, you can praise and reward them when they are brave. Avoiding scary TV shows, movies, and computer games can also help. Some children with bedtime fears feel better when they have a night light.
Check noise and light levels
Check if your child's bedroom is too light or noisy for sleep. Blue light from digital screens suppresses melatonin levels and delays sleepiness.
Keep naps early and short
If your older child is struggling to sleep at night, keep their nap to no longer than 20 minutes and no later than the early afternoon. Longer and later naps can make it harder for children to fall asleep at night.
Parental presence
This strategy involves using your presence to help your toddler settle. You can do this by lying down on a bed or mattress in your toddler's room with a night light on and pretending to sleep where your child can see you. If your toddler wakes up during the night and is distressed, make slight noises or movements (such as coughing or turning over) so they know you are there.
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Frequently asked questions
Yes, it is very common for babies and toddlers to laugh in their sleep. It is usually a reflex and a part of normal development. In most cases, it is nothing to worry about.
There could be several reasons why toddlers laugh in their sleep. It could be a response to dreams, a way to practice facial muscles, or a sign of a developing sense of humour. Some spiritual beliefs also associate it with divine interaction or spiritual intimacy.
In rare cases, sleep laughter could be a sign of gelastic seizures, REM sleep behaviour disorder, or sleep apnea. If your toddler is also crying in their sleep, it could indicate nightmares or night terrors. If you are concerned or if the laughing interferes with their sleep, contact your healthcare provider.
