The 5 S's for a crying baby — and the part the list leaves out

Your baby won't stop crying, it's midnight, and someone has told you to try "the 5 S's." They work fast on a lot of babies — that part is true. What the shortlist glosses over is one safety line worth reading twice, and a tool your own household probably already had before anyone gave it a name.

Here's what the 5 S's actually are, what evidence backs them, and what the neat five-item list leaves out.

What are the 5 S's?

The 5 S's are Swaddle, Side or Stomach position, Shush, Swing, and Suck — five ways of recreating the womb closely enough that a crying newborn settles. Paediatrician Harvey Karp named and packaged them in his 2002 book The Happiest Baby on the Block, calling the first three months outside the womb the "fourth trimester."

Wrap the baby snugly, hold them tipped slightly onto their side or stomach in your arms, make a loud shushing sound near their ear, add gentle rhythmic motion, and offer something to suck on. Karp's claim is that stacking all five together triggers a built-in calming reflex faster than any one of them alone.

None of it was invented in 2002. It was given a five-word name in 2002. A grandmother bouncing a wrapped baby while making a "shhh-shhh" sound over her shoulder was doing three of the five S's before anyone published a book about it.

It's also close to the instinct behind our own routine: something rhythmic, done by hand, while a baby is held. Karp packaged the in-the-moment version. Ours is the slower one.

Do the 5 S's actually work?

For a lot of babies, yes — quickly. A 2019 study in PLOS ONE tested swaddling, white noise, and rocking against a crying baby's heart rate and found the combination calmed babies faster than a parent's own unstructured attempts.

What it doesn't do is cure colic, fix a feeding problem, or replace checking the ordinary things first: hungry, wet, gas, overtired. It's a fast way to lower the temperature on a crying baby, not a diagnosis or a treatment.

We'd rather say that plainly than oversell it. Our own massage routine makes the same honest claim about itself — it calms, it doesn't cure, and anyone telling you otherwise is selling something.

Is the side or stomach hold safe for sleep?

No — and this is the line in the list worth reading twice. The "S" for side or stomach is only for a baby who is awake and held in your arms. Once your baby is asleep, put them down on their back, every time, whether you used the 5 S's or not.

The American Academy of Pediatrics' 2022 safe-sleep recommendations are direct about the second half of this: stop swaddling the moment your baby shows any sign of trying to roll, usually around three to four months. A swaddled baby who rolls face-down can't push back over, and the Academy is clear it has no evidence swaddling itself reduces the risk of SIDS.

Swaddling too tightly around the legs carries its own separate risk. Orthopaedic surgeon Nicholas Clarke, writing in Archives of Disease in Childhood in 2014, linked straight-leg swaddling to hip dysplasia and recommended what's now called hip-healthy swaddling: legs bent up and out, never pinned flat and together.

None of that means skip swaddling. It means do it the way that keeps hips loose and stop the moment your baby starts to roll — the same two rules we'd want followed with any of our own routine's holds.

What the 5 S's leave out

There's no S for touch. Karp's list is built entirely around recreating womb conditions in the moment — motion, sound, snugness — and says nothing about the slower, hands-on kind of calming that generations of households never bothered to name because it was simply what you did with a baby every day.

In an Indian household, massage wasn't a rescue technique pulled out at midnight. It was daily, done by the mother, the paternal grandmother, or whoever's hands were free that morning, and the calm it produced was a side effect nobody needed a study to notice.

"'Bump' her by quickly lifting and lowering/shaking lightly under her bum to settle," one parent wrote on Mumsnet in June 2009, describing the hold her own family had landed on for a fussy seven-week-old — a sixth S nobody had written down yet, built entirely by trial and error at home.

That's really the gap in any five-item list: it assumes the crying is a single moment to defuse, not a daily relationship with a body that gets easier to read with practice. Our piece on ordinary fussiness goes further into what that practice actually looks like.

What to do instead, or alongside

Use the S's for the acute moment — a car ride home, a screaming midnight stretch, a baby who won't stop and nothing obvious is wrong. They're built for exactly that and they're quick.

This is the same split a grandmother would recognise without needing it explained: the quick fix for right now, and the slower, daily thing that makes the quick fix less necessary over time.

Use a short daily massage for the slower work: learning your own baby's particular cries, building a calm ten minutes into the day before things go sideways, and giving your hands something specific to do besides bounce and hope. Our witching-hour piece covers timing a short massage right before the hardest part of the evening starts.

The two aren't competing. A baby who gets a calm massage most afternoons still has hard nights, and the 5 S's are exactly the tool for those — we'd never claim our own routine replaces them.

What to take from this

The 5 S's are a real, fast, well-named shortlist for a crying baby in the moment. Use them. Just remember the side and stomach hold is for your arms, not the cot, and swaddle with the legs free to bend.

For the part the list doesn't cover — the daily, unhurried kind of calm — a short massage is the older tool, the one your own household probably already had a version of, name or no name. Here's ours, five steps, about five minutes.