Why Is My Baby Laughing In Sleep? A Detailed Explanation

Our kids’ laugh is the best sound ever!

I still remember it back then, 24 hours after delivery, my baby was laughing in her sleep!

I thought it’s the anesthesia that is doing tricks in my eyes; but no, hubby also saw it. Too bad we were not able to record that one!

Thinking back now, that was unusual but not unexpected. Babies can indeed laugh, giggle, or cry in their sleep.


When Do Babies Start Laughing?

Sleep is not the only time your babies laugh. By the time they're about 3 months old, they will start laughing awake.

From the time they were born up to this age, your little ones are already practicing for all this giggling; hence, you hear coos and gurgles.

And when their vocal cords and facial muscles are ready, they will let out that chuckle we all have been waiting for.

At first, though, the laughter is not necessarily out of happiness. It's just a result of your baby's series of experiments.


You can always encourage laughter so later on he'll understand that it's a physical reaction to something funny.

Why are Babies Laughing in their Sleep?

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No child is too young to laugh. Even newborn babies can smile and laugh. Here are the possible reasons why your baby is laughing in sleep:

1. Learning

Babies are constantly bombarded with new sights and sounds during his first months of life. Their little brains are soaking up too much at daytime. They process this experience while sleeping, regardless if it is day or night.

Laughing or crying during sleep is a way for their small brains to grow. She is on her way to developing emotions, and it starts by processing her daily experience. That gives me another good reason I must never let my kid fight sleep.

2. Gas

Some experts say that babies could only do "social smile" by the time they are two months old. Smiles earlier than that could only mean that your baby is passing gas.

This claim is unfounded, but I cannot discount it since there isn’t much research connecting baby’s laughs and sleep. Babies who always fart are more prone to colic, hence expelling extra winds can make them feel so much better.

3. REM sleep stage

Babies have shorter sleep cycle. They can fall into deep sleep faster than adults.

As such:

Little ones tend to laugh and cry out of the blue an hour or two into their sleep. That’s because they are dreaming, as you can also see their eyes moving under those lids.

Perhaps the reason your baby is laughing in sleep is that she is reliving something funny that happened during the day. Don’t interrupt and don’t wake her up during this sleep stage or she’ll go fussy.

4. Other medical-related causes

Spontaneous occasional giggles and laughter are healthy for babies. That just means that your little one is contented and comfortable.


There are rare instances when fits and convulsions manifest as continuous laughs.

This rarely happens, but when it does, it is far from funny. Kids and babies are not supposed to laugh round the clock.

If your baby isn’t thriving and not gaining weight, or has difficulty sleeping, irritable and laughs like clockwork: then take her to the doctor.

Do not take this laughing symptom mildly, especially if it affects your baby’s rest times. There are a few organic reasons behind convulsive laughs, and it is your child’s doctor that can best explain that.


sleeping baby girl

There are lots of reasons your baby’s laughing in sleep. Most of the time, it is that they are dreaming and their little brains are growing. It will take 6 – 8 weeks for your baby to smile due to external stimuli. 


Don’t get perplexed if your newborn laughs in his sleep. Baby laughing in sleep is normal. Tooth or no tooth, they are simply adorable!

Sarah Morgan

Chief editor of WellBeingKid.com and striving mom-extraordinaire.Let me share and inspire you with my daily struggles to live a healthier and more fulfilling life.

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