Newborns' Sleep Crying: Understanding The Reasons And Solutions

why do newborn cry in their sleep

It can be distressing for parents to see their newborn cry in their sleep. However, it is a common occurrence, and there are several reasons why it happens. Newborns go back and forth between non-rapid eye movement (NREM) and rapid eye movement (REM) sleep, and it is during the latter phase that they dream, which can often come with some noises and tears. As newborns are still learning to regulate their emotions, they may not be able to control their crying reflex. Additionally, they might be hungry, uncomfortable due to a dirty diaper, or too hot or cold. Crying during sleep can also be tied to developmental milestones, as their brains are busy learning new skills, which can disturb their sleep.

Characteristics Values
Normal or cause for concern? Crying in sleep is considered normal for newborns as they adjust to their new sleep patterns.
Reasons Hunger, discomfort, temperature (too hot or cold), dirty nappy, teething pain, light, noise, brain development, nightmares, fatigue, and more.
Sleep patterns Newborns go back and forth between non-rapid eye movement (NREM) and rapid eye movement (REM) sleep. They spend 50% of their sleep in each stage.
Sleep cycles A baby's sleep cycle is around 40 minutes.
Soothing methods Creating a calming pre-sleep routine, ensuring a conducive sleep environment, responding appropriately to their cries during light sleep stages, soothing methods like a gentle hand on their chest or soft shushing sounds, etc.

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Babies cry in their sleep due to hunger or discomfort

A newborn baby's cry is their only form of communication, and it can be a natural way for them to communicate their needs. Hunger is a common trigger for crying in newborns, as their tiny stomachs require frequent nourishment. This type of crying is typically rhythmic and may be accompanied by rooting or sucking motions. If you are breastfeeding, your baby may be crying due to their positioning and attachment, which can be improved with the help of a breastfeeding group or your health visitor. Crying during feeds can also be a symptom of reflux, a common condition where babies bring back milk after feeds.

Discomfort can also cause babies to cry in their sleep, even if they do not fully wake up. This can include physical discomforts like teething pain, gas, or a wet diaper. It could also be due to their clothing being too tight or uncomfortable temperatures. Checking and addressing these basic needs can often soothe them quickly.

Babies may also cry due to changes in their sleep cycles or the desire for comfort and reassurance, especially during periods of separation anxiety. An overstimulating day filled with new experiences, sights, and sounds can make it harder for babies to settle down and sleep peacefully, and they may struggle to calm themselves. Strict sleep training methods are not suitable for newborns, but establishing a calming pre-sleep routine and a conducive sleep environment can help.

If your baby is constantly crying and you cannot console or distract them, or the cry does not sound like their normal cry, it can be a sign that they are ill. If this is the case, contact your health visitor, GP, or call NHS 111.

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They may be transitioning between sleep cycles

Newborns sleep in short bursts, typically for 20 to 50 minutes at a time. These sleep cycles consist of active sleep and quiet sleep. During active sleep, newborns may move, groan, open their eyes, cry out, or breathe noisily or irregularly. During quiet sleep, they will lie relatively still and their breathing will be more even. It is normal for newborns to wake between sleep cycles, and they will learn to settle themselves and fall back to sleep as they get older. This ability to settle themselves between sleep cycles is called self-settling.

Newborns' sleep cycles are not yet fully developed, and they do not have established sleep-wake rhythms. They are still adjusting to life outside the womb and learning the difference between day and night. As a result, newborns may be transitioning between sleep cycles when they cry in their sleep.

During the first three months, newborns cry a lot as it is their main form of communication. They may be hungry, need a diaper change, or be too hot or cold. They may also be experiencing teething pain, separation anxiety, or the Moro reflex, which can cause wild hand motions that lead to accidental self-harm.

As newborns develop and learn new skills, their sleep may become more unsettled. These developmental milestones can cause temporary regressions in their sleep patterns, resulting in more crying at bedtime or during the night. However, these phases are usually temporary, and it is important not to panic.

It is recommended to give newborns a little time to see if they can calm themselves before offering help. This can encourage them to learn how to transition between sleep cycles independently, which is crucial for developing healthy sleep habits.

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Brain development can cause crying and sleep regression

It is quite common for babies to cry in their sleep. This is because they are still learning to regulate their emotions and may not be able to control their crying reflex. Crying in sleep is considered normal when they are only a few weeks old as they adjust to their new sleep patterns. Newborns go back and forth between non-rapid eye movement (NREM) and rapid eye movement (REM) sleep. When they are in the REM phase, they dream, which can often come with some noises and tears.

As your baby develops, their sleep patterns will continue to change, with temporary regressions that can result in more crying at bedtime or waking during the night. These regressions are a result of developmental progressions. For example, when babies learn new skills like rolling over or crawling, their brains are so busy that their sleep is often disturbed. A 4-month sleep regression is often the hardest for parents as it is usually the first one. Signs of a 4-month sleep regression include difficulty falling asleep, frequent wakings, irritability, and reduced sleep duration. Toddlers often go through sleep regressions at around 15 months, 18 months, 2 years, and 3 years. These regressions may be caused by nightmares and night terrors, fear of the dark, teething, and separation anxiety.

Sleep regressions can last 1-2 weeks, but letting go of healthy sleep habits during this time can lead to ongoing struggles. A healthy sleep foundation can reduce the impact and length of a sleep regression. Practicing good sleep hygiene with your infant can aid in the resolution of sleep regressions. To overcome sleep regression, caregivers should encourage healthy sleep routines and habits for their baby. If your infant wakes up during the night, keep the room dark and quiet to avoid stimulating them and gently encourage a return to sleep.

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Newborns tend to cry in their sleep due to teething pain

It is quite common for babies to cry in their sleep. This is because they are still learning to regulate their emotions and may not be able to control their crying reflex. Teething pain is one of the reasons why newborns tend to cry in their sleep.

Teething can be a challenging phase for both babies and caregivers. The discomfort and pain associated with emerging teeth can lead to incessant crying and sleepless nights. The pain and inflammation can cause crankiness, sudden movements, and high-pitched crying. The molars and canines, in particular, can be very painful and affect eating habits for several days. Teething can also cause excessive drooling, which can lead to a teething rash if not cleaned properly.

To soothe teething pain, chilled teething toys or teethers can be provided to the baby. These can be kept in the fridge or freezer to offer a cold and soothing sensation to the baby's gums. It is important to maintain the baby's bedtime routine and general daily structure as much as possible during this time. Soothing methods such as white noise, soft shushing sounds, or a gentle hand on the chest can also help the baby transition to sleep.

If the baby seems to be in severe pain, over-the-counter medications like ibuprofen or paracetamol can be considered after consulting a pediatrician or pharmacist. It is important to remember that teething is a temporary phase, and eventually, it will pass.

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It could be due to their sleep environment, such as temperature or light

It's quite common for babies to cry in their sleep. This is because they are still learning to regulate their emotions and may not be able to control their crying reflex. Crying is a baby's primary form of communication, and it is how they let caregivers know they need something.

Babies sleep in cycles, and as they transition from one cycle to another, they pass through a "lighter" kind of sleep. It may be in these moments that they momentarily wake up and cry out before going back to sleep. During REM sleep, it is common for them to stir, stretch, jerk, twitch, and even cry out. A baby's sleep cycle is around 40 minutes, and during their brief awakening at the end of each cycle, you may notice them do something strange that will cause you to check on them.

The sleep environment plays a crucial role in a baby's sleep quality. A too-hot or too-cold sleep environment, teething pain, wayward light, or outside noise can disturb a sleeping baby, bringing on middle-of-the-night crying. It is important to ensure the room is dark, quiet, and at a comfortable temperature to help minimise disruptions.

As your baby grows, you will be able to better pinpoint what is happening when they cry in their sleep. In the early days, it can be challenging to decipher the reason for their crying, and you may need to play detective to figure out what is wrong. Over time, you will understand your baby better and may be able to interpret their cries more easily. For example, you may discover that one particular cry means they are hungry, while another indicates pain.

Frequently asked questions

Yes, it is quite common and normal for newborns to cry in their sleep.

Newborns cry in their sleep due to hunger, discomfort, temperature (too hot or cold), a dirty nappy, or teething pain. It could also be because they are transitioning between sleep cycles.

To soothe a newborn crying in their sleep, you can try using a pacifier, creating a calm and peaceful environment, or using soothing methods like a gentle hand on their chest or soft shushing sounds.

Newborns do dream, but they do not experience dreams in the same way as adults until they are around two years old. During REM sleep, newborns may stir, stretch, jerk, twitch, and even cry out.

Occasional crying in sleep is normal and nothing to worry about. However, if you are worried about persistent crying in longer bursts, you can contact your GP or health visitor.

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