Why Is My Baby Not Sleeping: Causes And Solutions

A baby may not sleep because of hunger, gas, reflux, illness, overstimulation, a changing sleep pattern, or a schedule that does not match their age. In the United States, many babies also wake often because they are still developing their body clock and need frequent feeds.

Some night waking is normal. A newborn may sleep in short blocks, while an older baby may wake because of teething, separation anxiety, or a new skill. The safest approach is to check for basic needs first, protect safe sleep, and then build a calm, age-appropriate routine.

How Much Sleep Does a Baby Need?

Babies need different amounts of sleep by age. The American Academy of Sleep Medicine (AASM) recommends these total sleep ranges in a 24-hour period:

Age	Recommended total sleep
Birth to 3 months	About 14–17 hours
4 to 12 months	About 12–16 hours, including naps
1 to 2 years	About 11–14 hours, including naps

These are ranges, not daily targets that every baby will meet. A healthy baby may sleep a little more or less on a given day.

Newborn sleep is often spread across the whole day and night. Newborns also wake to eat because their stomachs are small. Day-night confusion is common during the first weeks.

By about 3 to 6 months, some babies begin to sleep for longer night periods. However, development is uneven. One baby may sleep five hours at night while another still wakes every two to three hours.

What counts as “not sleeping”?

Parents may use this phrase to describe several different problems:

• Trouble falling asleep
• Waking soon after being put down
• Waking many times at night
• Taking short naps
• Skipping naps
• Needing to be held or fed to fall asleep
• Waking very early in the morning
• Crying at bedtime

Each pattern can have a different cause. A baby who wakes every two hours may need something different from a baby who refuses the last nap.

Why Is My Baby Not Sleeping?

The most common causes are hunger, discomfort, an unsuitable sleep schedule, overstimulation, illness, and normal developmental change.

1. Your baby may be hungry

Newborns often wake because they need to feed. Breast milk and formula are digested quickly, and young babies cannot always take enough milk to last through a long night.

Older babies may also wake from hunger during growth spurts. If your baby is not gaining weight well, has fewer wet diapers, or feeds poorly, contact the child’s pediatrician before trying to reduce night feeds.

Do not add cereal to a bottle or start sleep training to solve feeding concerns without medical advice. These steps may not address the real problem and can create safety risks.

2. Your baby may be overtired

An overtired baby can have a harder time settling. They may cry, arch their back, seem frantic, or fall asleep briefly and then wake.

This can create a cycle:

1. The baby misses a nap.
2. The baby becomes overtired.
3. The baby struggles to fall asleep.
4. The baby sleeps poorly.
5. The next sleep period becomes harder.

Watch for early signs of tiredness, such as staring away, slower movement, yawning, rubbing the eyes, or becoming quiet. Crying is often a late sign.

3. Your baby may not be tired enough

A baby who has slept too much during the day or went to bed too early may resist sleep. This is more common in older infants who are moving from several naps to fewer naps.

A long late-afternoon nap can also reduce sleep pressure at bedtime. The answer is usually a gradual schedule change, not keeping the baby awake for a very long time.

4. Your baby may be uncomfortable

Common sources of discomfort include:

• A wet or dirty diaper
• Being too hot or too cold
• Tight clothing
• Hair wrapped around a toe or finger
• A stuffy nose
• Gas
• Constipation
• Eczema or itchy skin
• Teething discomfort
• Reflux symptoms

Check your baby from head to toe. A hair tourniquet, for example, can cause sudden crying and needs prompt attention.

5. Your baby may be overstimulated

Bright lights, loud sounds, visitors, screens, active play, and frequent handling can make it hard for a baby to wind down.

A baby does not need a silent home. Still, a slower pace before sleep can help. Lower the lights, reduce noise, stop active play, and use the same short routine each time.

6. Your baby may be learning a new skill

Rolling, sitting, crawling, pulling up, and walking can disrupt sleep. Babies may practice these skills in the crib instead of settling.

Sleep may also change during separation anxiety. This often becomes more noticeable in the second half of the first year. The baby may wake and cry when a parent leaves the room.

These changes are usually temporary. Offer comfort while keeping the response calm and consistent.

7. Your baby may be sick

A cold, ear infection, fever, breathing problem, stomach illness, or other condition can disturb sleep. Babies may not show illness in the same way older children do. A change in feeding, wet diapers, energy, or breathing may be more useful than sleep alone.

If your baby suddenly sleeps poorly after previously sleeping well, look for signs of illness or pain.

What to Check First When Your Baby Will Not Sleep

Use this order: safety, illness, basic needs, sleep timing, then sleep habits.

Step 1: Check for urgent symptoms

Seek urgent medical care if your baby has trouble breathing, turns blue or gray, is difficult to wake, has a seizure, or has signs of severe dehydration.

For a baby younger than 3 months, a rectal temperature of 100.4°F (38°C) or higher requires prompt medical advice. Call the pediatrician right away for instructions.

Also contact a health professional if your baby:

• Feeds much less than usual
• Has clearly fewer wet diapers
• Vomits repeatedly
• Has bloody stool
• Has a weak or unusual cry
• Seems in severe pain
• Is unusually limp, sleepy, or hard to wake
• Has a fever or illness that concerns you

Trust your judgment. You do not need to wait for a sleep problem to become severe before calling the pediatrician.

Step 2: Meet basic needs

Check whether your baby needs:

• A feed
• A burp
• A clean diaper
• A comfortable layer of clothing
• Help with a blocked nose
• A break from stimulation
• A brief cuddle

For safe sleep, place the baby on their back on a firm, flat surface. Use a fitted sheet only. Keep pillows, blankets, bumpers, stuffed toys, and weighted sleep products out of the sleep space.

The American Academy of Pediatrics safe sleep guidance recommends room-sharing without bed-sharing, ideally for at least the first six months.

Step 3: Check sleep timing

Ask three questions:

1. How long has my baby been awake?
2. Did the last nap end too late?
3. Does my baby seem tired, or only bored and fussy?

Avoid treating wake windows as exact rules. They are rough guides, not medical limits. Your baby’s behavior matters more than a clock.

Step 4: Reduce stimulation

Make the room calm and dim. Use a quiet voice. Keep the routine short and predictable.

A routine might include:

1. Feed, if needed
2. Diaper change
3. Pajamas or sleep sack
4. A short song or book
5. A cuddle
6. Into the crib on the back

The routine does not need to be long. Repeating the same steps helps your baby learn what comes next.

How to Help a Baby Sleep Better

The best plan depends on age, feeding needs, health, and the pattern of waking. Start with safe, simple changes.

Keep day and night different

During the day, expose your baby to normal household light and sound. Offer feeds and interaction. At night, keep lights low and responses quiet.

This supports the development of the circadian rhythm, the body’s internal day-night clock. Newborns do not have a mature circadian rhythm at birth, so the change takes time.

Use a consistent bedtime routine

A predictable routine can lower stress before sleep. It does not need to guarantee sleep. Its purpose is to create a repeated cue.

Use the same order most nights. If the baby becomes more upset, shorten the routine and focus on comfort.

Put your baby down safely

Place your baby:

• On their back for every sleep
• On a firm, flat crib, bassinet, or portable play yard mattress
• In their own sleep space
• With no loose items in the sleep area

If your baby falls asleep in a car seat, stroller, swing, or carrier, move them to a firm, flat sleep surface as soon as practical. These devices are not designed to replace a crib or bassinet for routine sleep.

The CDC safe sleep recommendations provide current U.S. guidance for reducing sleep-related risks.

Try “drowsy but awake” only if it helps

Some babies can settle when placed down drowsy but awake. Others need more help, especially when they are newborns, ill, hungry, or highly upset.

This is not a test your baby must pass. If placing the baby down awake leads to intense crying, comfort them and try again later. A calm, responsive approach is more useful than forcing a single method.

Respond to night waking in a boring way

When the baby wakes, pause briefly if they are only making light sounds. If the baby cries, check them.

Keep nighttime care simple:

• Use low light
• Speak softly
• Change the diaper when needed
• Feed when the baby is hungry
• Avoid play
• Return the baby to the crib on their back

This teaches that nighttime is for sleep without ignoring the baby’s needs.

Baby Sleep Problems by Age

Newborns: birth to about 3 months

Frequent waking is normal at this age. Newborns may sleep for only one to three hours at a time and may not know the difference between day and night.

Focus on feeding, safe sleep, comfort, and gradual day-night cues. Do not expect a strict schedule.

Babies around 4 to 6 months

Sleep patterns may become more predictable, but this is also a common time for changes. Babies may wake between sleep cycles, begin rolling, or need help adjusting to a new nap pattern.

Ask the pediatrician about feeding and growth before making major changes to night feeds.

Babies around 6 to 12 months

Separation anxiety, crawling, pulling up, teething, and changes in naps can affect sleep. Some babies also become more alert and resist bedtime.

A consistent routine and a safe sleep space matter greatly at this stage. If your baby can roll both ways, you do not need to keep turning them back every time they change position, but always place them on their back to start sleep.

Toddlers over 12 months

Toddlers may resist sleep because of independence, limits, fears, or a transition from two naps to one. A clear routine and consistent boundaries often help.

The safe sleep rules still matter. Keep the sleep area free of hazards and follow current pediatric guidance.

Should You Try Sleep Training?

Sleep training means using a planned method to help a baby settle and return to sleep. It is not one single technique. Methods range from gradual parental withdrawal to timed checks and other structured approaches.

Sleep training is not appropriate for every family or every baby. First address hunger, illness, pain, feeding problems, unsafe sleep, and major schedule issues.

Before starting, consider:

• Your baby’s age and health
• Whether the baby is growing well
• Night feeding needs
• Your ability to follow the plan consistently
• Your comfort with the chosen method
• Advice from your pediatrician

Do not use sleep training to ignore a baby who may be sick or in pain. Do not leave a baby in an unsafe sleep setting to encourage longer sleep.

There is no need to use a harsh method. A gradual plan may work for some families, while others prefer responsive settling. The key is to use a safe approach that fits the baby and the caregivers.

Common Baby Sleep Mistakes to Avoid

Keeping a baby awake to make them more tired

This often backfires. An overtired baby may cry more and settle less easily.

Using unsafe sleep products

Inclined sleepers, loungers, sleep positioners, weighted swaddles, and soft bedding can increase risk. Check current U.S. safety guidance before using any sleep product.

Swaddling after the baby shows signs of rolling

Stop swaddling when the baby tries to roll. Use a sleep sack that leaves the arms free instead.

Never use a weighted swaddle or weighted blanket for an infant unless a qualified clinician gives specific guidance.

Adding cereal to a bottle

This does not reliably improve sleep and can create feeding and choking concerns. Use only feeding changes recommended by your baby’s health professional.

Changing the plan every night

A new method each night can make it difficult to see what helps. Make one reasonable change, use it consistently for several nights when safe, and track the result.

Comparing your baby with another baby

Sleep varies widely. A friend’s baby, a sibling, or an online post is not a reliable measure of your baby’s health.

When to Call the Pediatrician About Sleep

Call your baby’s pediatrician if sleep problems persist and affect feeding, growth, mood, or family functioning. Also call if you suspect reflux, eczema, allergies, constipation, an ear infection, breathing problems, or another medical issue.

Keep a short sleep and feeding log before the visit. Record:

• Sleep times
• Nap length
• Feeds and amounts, if measured
• Wet diapers
• Crying episodes
• Fever or other symptoms
• What helped or made things worse

This information can show patterns that are hard to see during a stressful night.

A pediatrician may assess growth, feeding, breathing, pain, and development. They can also help you choose a safe sleep plan that matches your baby’s age and health.

Frequently Asked Questions

Why is my baby suddenly not sleeping at night?

A sudden change may come from illness, teething, a growth spurt, a new motor skill, separation anxiety, or a nap change. Check for symptoms first. If the change is severe, lasts, or affects feeding, contact the pediatrician.

Why does my baby wake up 30 minutes after falling asleep?

Thirty minutes may be close to the end of a baby’s first sleep cycle. The baby may be hungry, overtired, undertired, uncomfortable, or unable to settle between cycles. Review the last wake period and check for illness or discomfort.

Should I feed my baby every time they wake?

Newborns often need frequent feeds. Older babies may wake for comfort or habit, but feeding needs depend on age, growth, and health. Ask the pediatrician before reducing night feeds, especially if weight gain is a concern.

Why will my baby sleep only when held?

Your baby may prefer the warmth, movement, and contact of being held. This is common, but an adult must not fall asleep with a baby on a couch, chair, or bed. When possible, place the baby in their own firm, flat sleep space.

Can teething cause poor sleep?

Teething can make some babies more unsettled, but not every sleep problem is caused by teething. Fever, diarrhea, breathing trouble, or severe distress should not be dismissed as teething. Ask a health professional about safe pain relief.

Conclusion: What to Do Tonight

Start with safety and health. Check for hunger, discomfort, temperature, illness, and signs of overtiredness. Then use a short routine, dim lights, calm responses, and a firm, flat sleep surface.

Newborn waking is often normal. Older babies can also have temporary sleep changes during growth, illness, teething, separation anxiety, and new skills. If your baby is difficult to wake, breathing poorly, feeding much less, dehydrated, or younger than 3 months with a temperature of 100.4°F (38°C) or higher, seek prompt medical advice.