Medically Verified by – Dr Jitendra Singh M.B.B.S, M.D (Pediatrician & Neonatologist)

If you are a new parent, you would have spent long moments just watching your baby sleep. While sleeping you might have notice their face suddenly twitching, smiling, frowning or making cute expressions. These funny faces during sleep often make the parents wonder if something is wrong or if their newborn is dreaming.

The truth here is that newborn sleep behaviour is unique and goes through rapid changes in first few months of life. As their facial expressions are a normal part of newborn growth and development, showing how quickly their brain and nervous system are maturing.

Start reading to know why newborns make funny faces while sleeping, what all these expressions mean and when to reach out to a paediatrician to get professional advice.

Understanding Newborn Sleep Behaviour

Newborns spend most of their early days sleeping. A typical newborn sleep cycle lasts around 40–50 minutes and moves between two phases:

• Active sleep (similar to REM sleep in newborns)
• Quiet sleep (deep sleep)

Their brain is still learning to regulate movement, breathing and facial reflexes. This is why newborns make funny faces while sleeping, stretch, twitch, smile and occasionally grunt. As these expressions could look surprising, but are part of normal newborn behaviour that are linked to the rapid development happening beneath the surface.

Active Sleep: The Main Reason Behind Funny Faces

If you notice your baby moving their lips, raising their eyebrows, smiling slightly or making weird faces, they are most likely in active sleep. This stage is similar to the REM sleep in newborns, where their brain is highly active even though the body is resting. While during active sleep, you can notice:

• Light twitching
• Sudden jerky movements
• Eye fluttering
• Mouth movements
• Soft whining sounds
• Smiles or brief grins

This stage plays a major role in newborn brain development. The baby’s brain is processing new sensations, bonding experiences and reflex responses. These movements are signs that the neural pathways are forming rapidly.

Newborn Reflexes Affect Facial Expressions

Your baby is born with natural reflexes that help them survive and grow. Many of these reflexes appear as facial movements during sleep. Common newborn reflexes that cause them to make funny faces include:

1. Moro Reflex
A sudden twitch or startled look while sleeping.

2. Rooting Reflex
A sucking or lip-pursing motion that helps the baby feed.

3. Smiling Reflex
A soft reflexive smile, which is different from social smiling.

4. Grimacing Reflex
Quick frowning or expressions that might look like discomfort but they are perfectly normal.

These reflexes show signs of healthy neurological functioning of your baby.

Why Do Newborns Smile in Their Sleep

The most common questions that the new parents ask is: Why do newborns smile while sleeping?

The reason behind this tiny smile during sleep is one of the sweetest sights. Here are the reasons behind it:

1. Reflexive Smiles
In the first few weeks, a newborn smile is usually a reflex. It happens without emotional meaning and often appears during active sleep.

2. Brain Development
As the brain forms connections, the facial muscles activate. This is why infants smile in sleep even before they learn to smile socially.

3. REM Sleep Activation
During REM sleep, facial nerves fire repeatedly. This creates quick grins or twitching around the mouth.

4. Emotional Development
By week 6–8, newborn smiling in sleep may start showing emotional development, bonding memory, and early cognitive processing.

So, why newborn smile in sleep? Because their nervous system is growing due to which their reflexes are active and their brain is shaping early emotional pathways. If you ever feel unsure about your baby’s sleep expressions, the best paediatrician in Lucknow at Sanjivini Super Speciality Hospital in Lucknow can guide you with expert newborn care.

Baby Twitching, Grunts and Other Sleep Movements

Newborn sleep behaviour includes many movements that appear odd at first. You may notice:

• Baby twitching while sleeping
• Sleep grunts in newborns
• Lip smacking or tongue movements
• Tiny frowns and grimaces
• Arm or leg jerks
• Eye movements under the eyelids

Most of these actions come from active sleep and developing nerves. They are harmless and usually reduce as the baby grows.

Normal Newborn Facial Expressions During Sleep

You may see your baby do these things:

• Smiling briefly
• Frowning
• Stretching their mouth
• Raising eyebrows
• Scrunching their nose
• Opening their mouth slightly
• Sucking motions
• Pouting or mini frowns
• Sudden wide-eyed look (without waking fully)

All these newborn facial expressions are part of normal newborn behaviour. These little expressions show that the baby’s brain and reflexes are functioning as expected.

The Role of Newborn Brain Development

Newborns make faces because their brain is developing rapidly. Facial nerves, motor control, sensory processing and emotional pathways are all forming connections, especially during sleep. And this is why sleep is very essential for:

• learning
• memory building
• sensory development
• emotional growth
• neurological development

As the brain matures the newborns making weird faces becomes less frequent, and thus their sleep patterns slowly settle.

Understanding Infant Sleep Patterns

Babies spend nearly 50% of their sleep in active sleep. That means you will see many facial changes, movements, grunts and twitches. A typical newborn sleep cycle looks like:

• Active sleep (20–25 minutes)
• Quiet sleep (20–25 minutes)

This cycle repeats, which is why newborns make funny faces while sleeping during active sleep stages.

Is It Normal for Newborns to Make Faces?

Yes. It’s absolutely normal for the newborns to make faces, twitch, smile, grunt or show quick expressions while sleep. Do not worry unless there:

• Movements appear stiff or rhythmic
• There are long pauses in breathing
• The baby turns blue or looks distressed
• The expressions come with fever, poor feeding or lethargy

If you do feel anything unusual, then consulting neonatologist near me would be a good idea.

When to Contact a Paediatrician

While most expressions are very normal, thus you may reach out to a specialist if you notice:

• Constant jerking instead of quick twitches
• Weak feeding along with unusual movements
• Difficulty waking up
• Limpness or low activity
• Very noisy breathing during sleep
• Persistent distress signs

The Pediatrics and Neonatology department Sanjivini Super Speciality Hospital is the best womens and childrens hospital near me in Gomti Nagar, that can help assess newborn sleep patterns, reflexes and their behaviour if you do have concerns.

Get Expert Newborn Care at Sanjivini Super Speciality Hospital

Sanjivini Super Speciality Hospital in Lucknow provides advanced neonatal care, newborn assessment, sleep behaviour guidance and complete support for all the new parents out there. With expert neonatologists, child specialists and modern facilities and services, parents receive reliable care and reassurance throughout the newborn phase.

The best pediatrician in Lucknow is available at Sanjivini Hospital that makes sures that every newborn gets safe, specialized and gentle medical attention from the very beginning.

Conclusion

Till now, you must have got to know why newborns make funny faces while sleeping because of their brain, nerves and reflexes are rapidly developing. These expressions are a normal and healthy part of newborn sleep behaviour and more important during active sleep. From smiling to twitching, every movement tells you that your baby’s nervous system is properly growing and learning.

Most of the facial expressions are harmless. Yet if anything feel unusual, then your paediatrician or neonatologist can guide you. With proper understanding and medical support from best paediatric hospital in Lucknow like Sanjivini Super Speciality Hospital, you can enjoy these adorable moments confidently.