The Crying Won’t Stop: A Calm Guide to Colic and the Purple Crying Phase
When your baby won't stop crying, colic and the Period of PURPLE Crying can feel terrifying. Here's what's normal, soothing moves to try, and when to tag out.
The quick version
- A baby who won't stop crying despite colic soothing techniques is usually going through the normal Period of PURPLE Crying, which peaks around 6-8 weeks and fades by 3-4 months.
- Colic is defined by the "rule of 3s": crying 3+ hours a day, 3+ days a week, for 3+ weeks in an otherwise healthy, well-fed baby.
- Try a soothing routine, but accept that sometimes nothing works and that is not your failure.
- Tag-team with your partner or village before you hit a wall; never shake a baby.
- Know the red flags that mean you should call your pediatrician instead of riding it out.
It's 2am. You've fed, changed, rocked, and swayed, and your baby still won't stop crying. You're Googling "baby won't stop crying colic" with one thumb while the wailing fills the whole apartment. First, breathe. You are not doing anything wrong, and your baby is almost certainly okay.
Relentless evening and nighttime crying in a young, healthy baby is incredibly common. It has a name, a predictable arc, and an end date. This guide walks you through what's happening, what sometimes helps, and the most important part nobody warns you about: how to tap out before you burn out.
What is colic, really?
Colic isn't a disease or a diagnosis of something wrong. It's a description of a pattern: a healthy, growing baby who cries intensely and inconsolably for long stretches, often in the late afternoon or evening. Doctors often use the "rule of 3s" to describe it.
- Crying for 3 or more hours a day
- On 3 or more days a week
- For 3 or more weeks
- In a baby who is otherwise feeding well and gaining weight
The honest truth is that researchers still don't fully know what causes colic. Many babies simply have a hard time settling during a developmentally intense window. It is not caused by something you did or didn't do.
The Period of PURPLE Crying
Many pediatricians prefer the term "Period of PURPLE Crying" because it reframes the crying as a normal phase rather than a problem to fix. PURPLE is an acronym that captures what makes this stretch so disorienting for exhausted parents.
| Letter | What it stands for | |
|---|---|---|
| P | Peak of crying, usually around 6-8 weeks | Peak of crying — it ramps up and then eases |
| U | Unexpected — it can come and go for no clear reason | |
| R | Resists soothing — your baby may cry even when you do everything right | |
| P | Pain-like face — they can look like they're hurting even when they're not | |
| L | Long-lasting — bouts can stretch for hours at a time | |
| E | Evening — crying often clusters in the late afternoon and night |
Knowing this is a period with a beginning, middle, and end can be the single most calming thing at 2am. For most babies the worst of it peaks around 6 to 8 weeks and winds down by 3 to 4 months.
This isn't medical advice
Every baby is different, and this article is general information, not a diagnosis. If anything here doesn't match what you're seeing, or you just feel uneasy, call your pediatrician — that's exactly what they're there for.
Colic soothing techniques to try
There's no magic switch, but a calm, repeatable routine helps more often than random frantic attempts. Try moving through these steps slowly, giving each one a couple of minutes before switching.
- 1Check the basics firstRule out a dirty diaper, hunger, or being too hot or cold. Sometimes the obvious thing is the thing.
- 2Swaddle snuglyA firm swaddle (arms in, hips loose) can recreate the close, contained feeling of the womb for younger babies.
- 3Add steady sound and motionWhite noise, a quiet shushing, gentle rocking, or a slow walk often work together better than any one alone.
- 4Try the side or stomach holdHolding your baby on their side or tummy across your forearm while they're awake and supervised can ease fussing. Always put them on their back to sleep.
- 5Offer suckingA pacifier or a clean finger can be calming, even between feeds.
- 6Step outside or change the sceneFresh air, a dim room, or a warm bath can sometimes reset a crying spiral — for both of you.
The 5 S's
Many parents lean on the "5 S's" — Swaddle, Side/stomach hold, Shush, Swing, and Suck. Stack two or three together and hold the routine steady for several minutes before deciding it isn't working.
When nothing works — and that's okay
Here's the permission slip no one hands you: sometimes you will do everything right and your baby will still cry. That is the "resists soothing" part of PURPLE, and it is not a sign that you've failed. A safe, fed, loved baby who is crying is still a safe, fed, loved baby.
If you feel your frustration rising and you're alone, it is completely okay to lay your baby down on their back in the crib, walk to another room, and take a few minutes to breathe. A few minutes of crying in a safe space will not harm your baby. Never, ever shake a baby — the urge to make it stop is real, and stepping away is how you keep both of you safe.
When to call your pediatrician
- A fever of 100.4°F (38°C) or higher in a baby under 3 months
- The cry sounds unusually high-pitched, weak, or different from the normal fussing
- Crying paired with vomiting, diarrhea, blood in the stool, or a swollen belly
- Poor feeding, fewer wet diapers, or no weight gain
- Your baby is hard to wake, unusually limp, or struggling to breathe
- Any crying that follows a fall or injury — or simply a gut feeling that something is wrong
Tag-teaming so no one burns out
Colic is a team sport. The parent on duty during a long crying jag runs out of patience long before the crying runs out of steam, so the goal is to trade off before anyone hits empty — not after.
Burning out solo
- One parent absorbs every hard shift
- Resentment and exhaustion build quietly
- Frustration peaks with no relief valve
- "I should be able to handle this alone"
Tag-teaming
- Planned hand-offs before the breaking point
- Each person gets real, guilt-free breaks
- The calmer hands take the baby
- "We're trading off — your turn to rest"
- Agree on a signal for "I need to tap out" before you're in the thick of it
- Split the night into shifts so each parent gets one protected block of sleep
- Lower the bar on everything else — dishes and laundry can wait
- Loop in your village: a grandparent or friend holding the baby for 30 minutes is a lifeline
- Check in on each other's mental health, not just the baby's
Protecting your own head
Endless crying wears down even the steadiest parent. Feeling angry, weepy, trapped, or numb during this phase is common and doesn't make you a bad parent. But if those feelings linger past the crying phase, or you have thoughts of harming yourself or your baby, reach out to your doctor right away — postpartum mood changes are real and treatable.
Be as gentle with yourself as you are with your baby. This phase is loud, it is hard, and it is temporary. You are going to get through it.
The bottom line
A baby who won't stop crying is one of the most frightening parts of early parenthood, but for most families it's the normal, time-limited Period of PURPLE Crying. Try your soothing routine, accept that some nights nothing works, trade off so no one burns out, and keep the red flags in your back pocket. The crying really does end — and so does this chapter.
Frequently asked questions
How long does colic and the Period of PURPLE Crying last?
For most babies the crying ramps up around 2 weeks, peaks around 6-8 weeks, and tapers off by 3-4 months. It can feel endless in the moment, but it is a phase with a clear end for the vast majority of healthy babies.
Is colic caused by something I'm doing wrong?
No. Colic isn't caused by your parenting, your feeding, or anything you did. Researchers still don't fully understand the cause, but it shows up even with calm, attentive, experienced parents. A healthy, fed, loved baby who cries is still doing fine.
What if none of the colic soothing techniques work?
Sometimes nothing works, and that's part of the "resists soothing" nature of this phase. If you've checked the basics and tried your routine, it's okay to lay your baby safely on their back and take a short break. Never shake a baby — stepping away is the safe choice.
How is colic different from something being medically wrong?
Colic happens in babies who are otherwise healthy, feeding well, and gaining weight. Warning signs that it might be something else include fever, vomiting, blood in the stool, poor feeding, fewer wet diapers, a high-pitched or weak cry, or difficulty breathing. When in doubt, call your pediatrician.
Can I do anything to prevent burnout during the colic phase?
Yes — plan hand-offs before you hit your limit, split the night into protected sleep shifts, lean on your village, and lower the bar on chores. Trading off with a partner or family member is one of the most effective things you can do for the whole family.
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