Teething pain, trouble falling back asleep, practicing crawling or babbling in the middle of the night? There are many reasons why your baby keeps waking up — and plenty of things you can do about it. I'm Sarah Mann, a certified sleep consultant and mom of seven. Today, I'll walk you through the 10 most common reasons why babies wake up frequently and share 12 of the best solutions to help you and your baby finally get more rest.
Does Your Baby Keep Waking Up? You're Not Alone!
New Zealand researchers found that 50% of 3-month-old babies sleep for 5 hours straight, and 50% of 5-month-olds manage 8 hours at a time. But 15% of babies still weren't sleeping 5 hours in a row by their first birthday.
A Canadian study revealed that 33% of 5-month-olds who wake frequently at night still can't sleep 6 hours straight at 2.5 years old. And another study found that 40% of 8-month-olds with sleep issues still struggled with sleep at 3 years old.
As you can see, it's definitely worth looking for the reasons and solutions behind frequent night wakings sooner rather than later!
Your Baby's Sleep Development in the First Year
First things first: Frequent night wakings are completely normal and usually nothing to worry about. Even babies who previously slept well can suddenly start waking up constantly at night. While we adults have a clear sense of day and night, newborns take weeks or even months to develop a consistent rhythm. Here's how sleep usually develops:
- At 3–4 months, many babies start sleeping longer stretches at night.
- At 4–6 months, their biological rhythm develops, which can bring a bit more structure and predictability to the day.
- From 6 months onward, nights might improve — or get worse due to developmental leaps and sleep regressions.
- At 8 months, babies become more mobile and active, which could mean better or worse sleep.
- At 10 months, many babies love pulling themselves up and standing in their crib — even in the middle of the night.
10 Reasons Why Your Baby Keeps Waking Up at Night
1. Sleep Cycle Transitions
A baby's sleep cycles are much shorter than an adult's — about 40–50 minutes. Each cycle consists of light and deep sleep phases, marked by different levels of brain activity. Between these transitions, babies naturally briefly wake up to check their surroundings.
These partial awakenings happen to all healthy humans. Adults might adjust their pillow and drift back to sleep. The real question is: can your baby self-soothe and transition to the next sleep cycle, or do they cry for help falling back asleep? This depends on age, brain maturity, personality, and sleep habits.
2. Brain Development
From around 6 months onward, we see brain wave patterns similar to those of adults. This means a clear developmental shift takes place. In theory, this suggests that most babies over 6 months old are capable of sleeping for at least 6 hours at night.
3. Need for Closeness
A newborn is brand new to the world and needs time to adjust. To develop a healthy attachment, babies require a lot of closeness, love, and cuddles — including at night. During the "fourth trimester" (the first three months after birth), it's essential to follow your baby's lead. As your baby grows — especially from 5–6 months onward — you can gently guide them to understand that daytime is for eating and cuddling, and nighttime is for sleeping.
4. Hunger
Young babies have tiny stomachs, and breast milk digests quickly. This means they naturally need to feed every 2–4 hours. One key factor is whether feeding becomes the only soothing method at night. While sucking helps babies settle quickly, it can also create a long-term association with sleep — leading even older babies to wake up frequently at night demanding to nurse for comfort.
5. Physical Discomfort
Even good sleepers can struggle when dealing with teething pain. The first tooth typically erupts between 6–12 months. Other causes of discomfort include colds, illnesses, and ear infections — which can make lying down particularly painful.
True sleep disorders like sleep apnea are very rare in babies, but warning signs include loud snoring, mouth breathing while asleep, and pauses in breathing. If you notice these signs, check with your pediatrician.
6. Lack of Bedtime Routines and Predictability
Babies thrive on routines and predictability. Without them, they may feel disoriented and unsettled, leading to more frequent night wakings. Many babies are put to bed too late, overtired, overstimulated, or at inconsistent times. When this happens, their bodies produce stress hormones instead of sleep hormones, making it harder to fall asleep and stay asleep.
7. Sleep Regressions
Right before or during major developmental milestones, even the best sleepers can suddenly struggle. These sleep regressions typically last 2–4 weeks and happen because your baby's brain is working overtime to master a new skill — rolling, scooting, crawling, sitting, standing, walking, babbling, and so much more.
8. Separation Anxiety
Separation anxiety usually starts around 8 months old and can come and go well into toddlerhood. This phase happens because your baby has developed a new understanding of object permanence — realizing that things (and people!) can be far away or even disappear. To ease separation anxiety, try playing peek-a-boo games, giving lots of reassurance, and allowing time for gradual adjustment.
9. Parental Nighttime Behavior
Research shows that parental responses at night influence a baby's sleep development. Babies who occasionally slept in their own bed early on and whose parents paused briefly before rushing to them at night tended to develop fewer sleep issues over time. Many babies make noise in their sleep without actually waking up — sometimes, simply waiting a few seconds to observe can work wonders!
10. Sleep Associations
Falling asleep in your arms, at the breast, or with a bottle is cozy and completely normal — especially in the first months. However, at some point between 4–8 months, many parents notice their baby takes longer and longer to fall asleep, needs more help resettling at night, and wakes up every 1–2 hours demanding the same sleep aid.
How to Respond When Your Baby Wakes Up – 6 Tips
1. Check If Something Is Wrong
Before anything else, make sure your baby is comfortable: Is the diaper full? Is your baby too hot or too cold? Are teething pains causing discomfort? If your baby sounds different than usual, investigate immediately and provide comfort.
2. Minimize Light and Noise Disruptions
Keep the room as dark as possible to prevent early morning light or headlights from the street from waking your baby too soon. White noise or soft music can help block out sudden loud sounds.
3. Stick to Your Sleep Habits During Sleep Regressions
When dealing with sleep regressions, illnesses, or growth spurts, try not to completely abandon your sleep routine. If your baby usually sleeps in their crib, avoid suddenly bringing them into your bed unless you want to continue that habit long-term.
4. Keep Nights Boring and Calm
Even if your baby wakes up for an extended period, avoid turning it into daytime. Don't turn on bright lights, don't start playtime or morning activities (never get up for the day before 6 AM!), move slowly and stay quiet, and use only dim lighting. The goal is to make nighttime unexciting so your baby associates it with sleep, not playtime.
5. Hunger? Maybe… Maybe Not!
Not every wake-up and cry means hunger! To prevent constant nighttime snacking, consider spacing out daytime feedings and encouraging full meals instead of frequent snacking. Avoid feeding as the first response to every night waking.
6. Pause Before Reacting
If your baby is fussing but not crying loudly, wait 1–2 minutes before responding. Over time, gradually extend this wait period to give your baby a chance to resettle independently. Many babies make noises while transitioning between sleep cycles without actually waking up.
6 Solutions to Help Your Baby Wake Up Less
- An age-appropriate early bedtime: From around 3 months old, most babies and toddlers sleep best with a bedtime around 7 PM.
- Avoid keeping wake windows too long: Especially before nighttime sleep. Overtiredness is the #1 enemy of good sleep!
- A structured daily routine with the right nap schedule: Good daytime sleep is essential for good nights.
- Establish a peaceful bedtime routine: Consistent rituals help your baby relax before sleep and transition smoothly into bedtime.
- Introduce comfort objects: A small lovey, blanket, or soft toy can provide comfort and familiarity at night. Most babies start showing interest around 6–7 months.
- Prioritize daytime calories: Ensure that most of your baby's calorie intake happens during the day — especially from 4–6 months onward.
I hope this helps — and that your little one starts sleeping longer stretches soon!
With love,
Sarah
Frequently Asked Questions
How many times should a baby wake up at night?
In the newborn phase, waking every 2 to 4 hours for feeding is completely normal. By 3 to 4 months, many babies begin sleeping longer stretches. From around 6 months, most healthy babies have the neurological capacity to sleep 6 hours or more without waking — though many still do wake, especially if sleep associations are present. There is no single "correct" number, but frequent wakings beyond 6 months are often a sign that something in the sleep setup can be improved.
What are the most common reasons babies wake up at night?
The most common causes include sleep associations (needing a parent's help to fall back asleep), overtiredness from inconsistent routines or missed naps, sleep regressions tied to developmental milestones, hunger in younger babies, physical discomfort such as teething, separation anxiety from around 8 months, and natural transitions between sleep cycles that the baby hasn't yet learned to navigate independently.
Does hunger cause most night wakings after 6 months?
After 6 months, hunger is often not the primary reason for frequent night wakings — especially if your baby is eating well during the day. At this age, most wakings are driven by sleep associations: your baby wakes between sleep cycles and needs the same conditions that were present at the start of sleep (nursing, rocking, a pacifier) in order to fall back asleep. Addressing how your baby falls asleep at bedtime is usually the key to reducing night wakings.
How do sleep associations cause night waking?
All humans cycle through light and deep sleep throughout the night — babies do too, roughly every 40 to 50 minutes. During these transitions, we briefly become semi-conscious. Adults usually roll over and fall back asleep without noticing. But if a baby has learned to fall asleep with a specific aid — nursing, rocking, or a pacifier — they expect that same aid when they surface between cycles. When it's gone, they call out for help to get it back.
When will my baby sleep through the night?
There is no single answer, but most babies have the developmental capacity to sleep through the night from around 6 months. Whether they actually do depends heavily on sleep habits, routines, and environment. Babies who can fall asleep independently at the start of the night tend to sleep much longer stretches. With consistent routines, an age-appropriate bedtime, and gentle sleep coaching if needed, most families see significant improvement within a few weeks.
