Baby wakes up at night: why it happens and what to do
There is a phase when you start to get used to your baby sleeping almost all night and, suddenly, they go back to waking up several times. When a baby wakes up at night like that, it is common to think we did something wrong. Most of the time, it is just a new stage of development clicking into place.
What is normal in night sleep
Waking during the night is expected and even healthy. We all wake up a few times, even without remembering it. What changes is whether the baby can go back to sleep alone or needs help for that. In the first months, they still depend on being held, on the breast or on movement to calm down, so the wakings are more frequent.
As the routine settles, the wakings tend to decrease, but they do not disappear all at once. It is like a staircase where sometimes we go up two steps and down one. To get an idea of where this staircase leads, it is worth understanding when a baby starts sleeping through the night more consistently.
Main reasons for waking
- Hunger, especially at the start, when the stomach is small and feeds are spaced close together.
- Discomfort, such as a dirty diaper, heat, cold or tight clothes.
- Colic or gas, which leave the baby restless and curled up.
- Growth spurts, when the body changes quickly and sleep is restless for a few days.
- Sleep habits, when the baby only falls asleep in your arms and is startled by the crib on waking.
- Environment, with light, noise or temperature that get in the way of returning to sleep.
Watching the baby closely helps you figure out which of these is the case. A baby who wakes up grumbling and settles on their own needs less intervention than one who wakes up crying hard and stiff with pain.
It is also worth considering the mood of the house. Babies notice when parents are tense, and the restlessness of the small hours can increase. Staying calm at the moment of waking, even when you feel like crying along, helps the night end faster.
What to do when the baby wakes up at night
A few attitudes help the night become calmer for everyone:
- Keep the light low and your voice soft, so you do not signal that it is time to play.
- Wait a few seconds before rushing to the crib, giving them a chance to settle again.
- Address the likely cause: hunger, diaper, heat or discomfort.
- If it is colic, offer positions and massage that calm them, as in the text on how to know if the baby has colic.
- Put the baby back in the crib still drowsy, when possible, so they associate the crib with sleep.
A practical tip: make the small hours predictable. Little light, little talking and little changing of position. The less stimulation the baby gets on waking, the easier they go back to sleep. A weak night light is enough to handle a diaper change without lighting up the whole room.
It also helps a lot to watch your own tiredness. An exhausted mother loses patience faster and the small hours become even more tense. Taking turns with your partner, sleeping a nap during the day and accepting help from those around you is not a luxury, it is upkeep for your energy. One bad night on its own spoils nothing; what really weighs is a run of terrible nights.
Why the baby wakes up at night in some phases
There are moments when sleep falls apart more clearly: around 4 months, from 8 to 10 months and when the baby starts to walk. In these phases, the brain is practicing new skills and sleep becomes lighter. This does not mean the previous routine was wrong, only that the baby has grown.
In these periods, keeping the sequence of the day helps a lot. If the organization of the day-to-day is confusing, it is worth reviewing the sleep routine by age and adjusting the times for waking, naps and bath. Babies respond well to predictability, even when they are restless.
When to seek help
Some signs fall outside what is expected and call for the pediatrician’s assessment: crying that does not stop, difficulty feeding, fever, frequent vomiting, weight gain below what is expected or a baby who is very sleepy during the day. It is also worth talking if you are exhausted to the point of not being able to care for yourself, because extreme tiredness deserves attention and support.
Frequently asked questions
Can a baby who sleeps through the night go back to waking up?
They can, and it is common. Sleep changes usually happen around developmental milestones, like rolling over, sitting up or walking. In most cases, the wakings decrease again when the novelty passes and the routine reorganizes.
Does letting the baby cry solve the wakings?
There is no single answer that works for every family. There are sleep training methods, but they are not mandatory nor recommended for every baby. You can follow your child’s rhythm, offer your presence and keep adjusting what works for you.
Does nursing at night get in the way of sleep?
In the first months, night feeds are necessary and normal. Over time, they tend to space out on their own as the baby eats more during the day. If the night is very broken up and the baby is older, talk to the pediatrician about how to reduce them gradually.
When a baby wakes up at night, tiredness speaks louder and you feel like finding a definitive solution. There is no shortcut that works for everyone, but there are adjustments that make the night lighter. Any doubt about a baby’s sleep or health should be taken to the pediatrician, who knows their history.
Ferramentas grátis para esta fase
- Calculadora de idade gestacional e data do parto Descubra em quantas semanas você está e a data provável do parto.
- Contador de contrações (trabalho de parto) Cronometre a duração e o intervalo das contrações.
- Calculadora de IMC (e ganho de peso na gravidez) Calcule o IMC e veja a faixa de ganho de peso de referência.



