Crying is your baby's first language, the one reliable way a newborn can say "I need something." That doesn't make it any easier to hear at 3 a.m., especially when you've fed, changed, and rocked and the crying keeps going.

The good news: most crying has an ordinary cause, and over the first weeks you'll get better at reading your baby. This guide walks through the most common reasons babies cry, a calm checklist for working through them, what's normal (including colic and the Period of PURPLE Crying), and when it's time to call your pediatrician.

Why babies cry: the usual suspects

There's no universal "cry dictionary," and every baby is a little different. Still, most crying falls into a handful of categories. Pay attention to the context (time since the last feed, how long they've been awake, what's going on around them) as much as the sound itself.

Hunger

Hunger is the most common reason young babies cry, especially newborns, who need to eat every two to three hours or more often. Crying is actually a late hunger cue. Earlier signs include:

  • Rooting (turning the head and opening the mouth toward your chest or hand)
  • Sucking on fists, fingers, or lips
  • Smacking or licking lips
  • Increasing fussiness and squirming

Feeding at these early cues often prevents the full-blown cry, and a calm baby usually latches or takes a bottle more easily than a frantic one.

Tiredness

It sounds backward, but overtired babies often find it harder to fall asleep. Watch for yawning, staring into space, rubbing eyes, pulling ears, jerky movements, or turning away from faces and toys. Young babies can only stay awake for short stretches; our guide to baby wake windows explains typical awake times by age.

Discomfort

Small physical annoyances add up quickly for a baby. Check for:

  • A wet or dirty diaper, or diaper rash
  • Being too hot or too cold (feel the back of the neck or chest rather than hands and feet)
  • Scratchy tags, tight clothing, or a hair wrapped around a finger or toe
  • Trapped gas or needing to burp

Overstimulation

Bright lights, noise, passing between many pairs of arms, a busy store: it can all be too much for a nervous system that's only weeks old. Overstimulated babies may cry, arch their backs, turn their heads away, or clench their fists. A quiet, dim room and less handling often helps more than trying yet another soothing trick.

Needing closeness

Sometimes babies simply want to be held. You cannot spoil a young baby with comfort.

Pain or illness

A cry caused by pain often sounds different: sudden, high-pitched, intense, and hard to soothe. Illness can also show up as a weak or unusually whimpering cry, or a baby who is much less responsive than usual. Trust your instincts here. You know your baby's normal better than anyone.

A calm checklist for a crying baby

When you're tired and the crying is loud, it helps to have a simple sequence you don't need to think about:

  1. Feed if it's been a while or you see hunger cues.
  2. Burp and check for trapped gas.
  3. Change the diaper and check clothing, temperature, and for hair tourniquets.
  4. Soothe: hold your baby close, sway or rock, walk, offer a pacifier, or try gentle shushing or white noise.
  5. Reduce stimulation: dim lights, lower the noise, and give your baby a break from new faces.
  6. Check for illness: take a temperature if your baby seems unwell, and see the red flags below.

Rhythmic motion and steady sound mimic the womb, which is why so many babies settle with a walk around the house, a stroller ride, or a consistent background hum. Our article on white noise for babies covers how to use it safely.

Colic and the Period of PURPLE Crying

Some healthy babies cry a lot, for long stretches, often in the late afternoon or evening, and nothing seems to help. Doctors often describe this as colic: frequent, prolonged crying in an otherwise healthy, well-fed baby. It typically begins in the first few weeks, tends to peak around six to eight weeks, and usually improves by three to four months.

The Period of PURPLE Crying is a helpful way to think about this phase. Each letter describes a normal feature of early infant crying:

  • Peak of crying: crying increases in the first weeks and peaks around the second month.
  • Unexpected: it can come and go for no obvious reason.
  • Resists soothing: your baby may keep crying no matter what you try.
  • Pain-like face: babies may look like they're in pain even when they aren't.
  • Long lasting: crying can go on for hours a day.
  • Evening: it often clusters in the late afternoon and evening.

The word "period" matters most: this phase has a beginning and an end. It is not a sign that you're doing something wrong. Still, always have your pediatrician check a baby who cries excessively, to rule out medical causes before you assume it's colic.

Never shake a baby

Hours of crying can push even the most loving parent to their limit. That's normal, and it's exactly why you need a plan before you get there. Never shake a baby. Shaking can cause severe brain injury or death, even if it's brief.

If you feel frustration rising:

  • Put your baby down safely on their back in the crib or bassinet, and walk away.
  • Close the door, take a few slow breaths, drink some water, or step outside for a few minutes.
  • Call your partner, a friend, a family member, or your pediatrician.
  • Check on your baby every 5 to 10 minutes, and return when you feel calmer.

A crying baby in a safe crib is okay. Taking a break is a responsible choice, not a failure. If you use a baby monitor, it can make stepping away easier: with BlinkBaby you can see and hear your baby from the next room while you reset, and the app's on-device cry detection sends a notification when your baby is crying, so you can take a few minutes knowing you'll be alerted.

When to call your pediatrician

Most crying is normal. But some signs mean your baby needs a medical opinion. Call your pediatrician if your baby:

  • Cries much more than usual, or the crying sounds very different (high-pitched, weak, or moaning)
  • Can't be comforted at all over a long period
  • Is feeding poorly or has noticeably fewer wet diapers
  • Is vomiting repeatedly, or has diarrhea
  • Seems unusually sleepy, floppy, or hard to wake
  • Has a rash, swelling, or seems to hurt when touched or moved

Seek urgent care or call emergency services if your baby:

  • Is under 3 months old and has a fever of 100.4°F (38°C) or higher, taken rectally
  • Has trouble breathing, is breathing very fast, or the skin looks blue or gray
  • Is limp, unresponsive, or very difficult to wake
  • Has a bulging soft spot, a seizure, or green or bloody vomit
  • Shows signs of dehydration, like no wet diaper for many hours, a dry mouth, or no tears
  • Has had a fall or injury, or you think they might have been shaken

When in doubt, call.

Caring for yourself through the crying

Listening to a baby cry is hard on your body and mind. A few things that help:

  • Take turns. If you have a partner, trade off shifts so one person can rest somewhere quieter.
  • Use earplugs or headphones when you're holding a crying baby, to take the edge off the volume while you keep soothing.
  • Accept help from people you trust, even for an hour.
  • Watch your own mood. Persistent sadness, anxiety, or feeling overwhelmed can be signs of postpartum depression or anxiety. Tell your doctor; it's common and treatable.

For more on keeping yourself going, see our sleep tips for exhausted parents.

The bottom line

Babies cry because they are hungry, tired, uncomfortable, overstimulated, want closeness, or occasionally because they are unwell. A simple checklist, a lot of patience, and knowing the red flags will get you through most of it. Some babies go through a phase of intense crying that peaks around the second month and then eases. That phase does end. Never shake a baby, take breaks when you need them, and call your pediatrician whenever something doesn't feel right.