Purple crying: what it is, and how to get through the evening

It's six in the evening, your baby has been crying for two hours straight, and nothing you try is working — this is purple crying. You've fed them, changed them, rocked them, checked their temperature, and gone through every position you know. A thought is starting to form that you don't want to have.

You are not failing. What you're describing is called purple crying, it has more than fifty years of research behind it, and it happens to healthy babies whose parents are doing everything right.

What is purple crying?

Purple crying is a normal developmental stage in which healthy babies cry far more than parents expect — often for hours, often for no cause you can find. It starts around two weeks old, peaks close to two months, and is usually over by four to five months.

The term comes from Ronald Barr, a developmental paediatrician who spent decades studying normal infant crying. It's the foundation of the parent education programme run by the National Center on Shaken Baby Syndrome.

Purple isn't a colour anything turns. It's an acronym, and each letter names something about this crying that catches parents off guard.

Nobody needs the acronym in a household where three generations already expect the evening stretch. When it starts, whoever has a free hand takes the baby — a grandmother, an aunt, a cousin passing through — treated as the part of the day everyone was already braced for, not a crisis.

The crying itself is the same everywhere. What differs is whether you're getting through it alone, or with someone already reaching for the baby — which is closer to what we'd want for every parent reading this at 6pm.

What does PURPLE stand for?

Each letter names a feature of this crying, and together they explain why it feels so different from ordinary fussiness.

That third letter is the one that breaks people. Resists soothing means a baby can be healthy, loved and fed, and still cry through everything you try. It isn't a verdict on your parenting, and it isn't a sign you're missing something obvious.

It's also why our own Night Calming routine was never built to promise an end to crying — nothing honestly can.

How long does purple crying last?

Crying climbs from around two weeks old, peaks at six to eight weeks, and typically ends by four to five months. Up to five hours a day at the peak is still considered normal.

That timing lines up with something else. The forty-day confinement period after birth — jaapa in much of India, chilla in Pakistan — is built for roughly this stretch, when a new mother traditionally wasn't left to manage a newborn alone. The crying peaks right around when that formal support usually winds down, which is exactly the wrong moment to be handling it solo.

Two things are worth holding onto regardless. The peak is a peak — the hardest part is the middle, not a permanent state. And it ends, even if you can't feel it easing week to week.

We wrote this page for exactly that stretch, from the two-week mark to the four-month one — not the whole of parenthood, just the part that's hardest to get straight information about at 6pm.

What happens if you reach your limit?

Put the baby down somewhere safe, walk out of the room, and let them cry. That's the honest answer, and it matters more than anything else on this page.

Infant crying is the most common trigger for shaking or hurting a baby. The incidence of abusive head trauma peaks a few weeks after the crying peak — not because those parents were monsters, but because inconsolable crying, at the end of a long day, with nothing left in reserve, is one of the most distressing sounds a nervous system can be asked to sit with.

This is the real argument for not doing this alone, and it's older than the research. A house with three generations in it means somebody else can always take the baby for twenty minutes — not as a favour, just as how the evening worked.

If that's not available to you, build it deliberately: a partner, a friend, your mother on the phone, a neighbour who's said yes before. Call before you think you need to.

Never shake a baby. Not once, not gently, not to make them stop.

We'd rather you called someone tonight than pushed through alone and regretted it. That's not a slogan on this page — it's the whole reason the page exists.

What actually helps?

Nothing switches purple crying off, and anything that claims to is selling you something. But some things lower the load, and they split into what works in the moment and what works between episodes.

In the moment: hold and move — the 5 S's (swaddling, side position, shushing, swinging, sucking) are the standard toolkit, and they won't work every time. Skin to skin helps often enough to be worth trying first.

Going outside, into cold air and a change of light, interrupts the cycle more often than it should. And if someone else is in the house, hand the baby over — not because they'll do better, but because you need twenty minutes.

Between episodes is where the real leverage is, and it's the part most advice skips, because you can't fix 6pm — you can only change what the rest of the day feels like. A short daily massage is one of the oldest tools going for that.

In most South Asian households it was never a technique or a class; it was a fixed slot in the day, usually before the bath, done by whoever was holding the baby that evening. A few minutes of slow, warm, predictable touch.

To be straight with you about the evidence: massage is not a treatment for colic or purple crying, and we won't pretend otherwise. Some small studies suggest it may reduce crying in some babies; the findings are mixed.

What it reliably gives you is a calm, connected point in the day that isn't a battle — and at week seven, that's not nothing. Our own Night Calming routine is built for exactly that slot: five steps, about five minutes, nothing to buy.

When is it not purple crying?

Purple crying is a diagnosis of normality, which means somebody qualified rules out everything else first. Call your paediatrician or health visitor if:

• Your baby has a fever, is vomiting, or has diarrhoea
• The cry sounds different — high-pitched, weak, or moaning
• They're feeding poorly, or producing fewer wet nappies
• They're unusually floppy, stiff, or hard to wake
• There's blood in their stool
• The crying starts suddenly after a period of being settled, or after a fall
• You're worried. That's a sufficient reason on its own

None of the above is purple crying. Get it checked — we're not your doctor, and this list is exactly what one would want you to look for first.

What to take from this

Purple crying is a phase in a healthy baby, not a problem with your baby and not a problem with you. It peaks at two months and ends by five.

Up to five hours a day is normal. Nothing cures it, and the goal is to get through it without anyone getting hurt.

Put the baby down if you need to. Ask for help before you think you need it — the way an entire household would have, without ever calling it a support system.

And on the days that aren't the worst days, a few quiet minutes of massage — the thing grandmothers did every evening without calling it anything — gives you a moment with your baby that isn't about endurance. If you want to know where that habit actually comes from, we've written about it here.