My partner bounced our baby quite vigoro
For reference only. Not medical advice.
Question
My partner bounced our baby quite vigorously during play and now I am worried about shaken baby syndrome. What is actually dangerous, and what signs mean we should go to the ER? Real household: caregiver juggling school week and one elder or sibling nearby. Schedule: Thu; after playtime. Kitchen/home right now: watching how the baby feeds, wakes and moves. Already tried: searching symptoms for hours instead of calling a nurse line. Please answer as a practical family-care guide: what to do next tonight/today, what to avoid, and a clear decision tree. Constraints: respect «No diagnosis, no medication changes»; no dosing kids/pets/elders yourself; no mystery powders or buying prescription meds online; keep steps screenshot-friendly under ~25 minutes where cooking/care applies. Structure your help as (1) what I already tried vs better alternatives, (2) constraints/avoid list, (3) red flags—when to stop DIY and get clinical/urgent help. Keep the voice concrete and kind for a tired caregiver; stay inside kitchen/home-care/communication levers only. Name what success looks like in 24 hours without promising cures. Avoid brand shopping lists; focus on routines, food already at home, and communication scripts caregivers can screenshot.
Answer
Call your baby's doctor or nurse line now, tonight, and say plainly: "Our baby was shaken, quite hard, during play." Ask to be seen today — or, if they cannot see her today, first thing tomorrow morning. If any sign in the red-flag list below is there now, go to the emergency department immediately, and if going alone is not safe or slower, call your local emergency number now and let them send help.
I cannot tell from here whether this is shaken baby syndrome — that is a finding a clinician makes, sometimes after imaging — but the check she needs is the same either way, and it should not wait for the morning. A baby who is feeding, waking and moving can still be carrying a head injury, and the younger the baby, the more careful the assessment needs to be.
What you did tonight, and what to do instead
| What you did | What it can and cannot tell you | Do this instead |
|---|---|---|
| Searching symptoms for hours | It lists every possible illness in the world. It cannot look at her eyes, her alertness, or her feeding in front of you. | One call to the nurse line, out loud, in plain words. Then the log below. |
| Watching her feed, wake and move | Good information — write it down with times, it is exactly what the clinician will ask for. | Keep watching, but write it, and hand it over. |
| Replaying the moment in your head | It cannot be undone tonight. | One line in the log: when, how long, did her head hit anything, was she asleep or crying hard. |
| Waiting to see what tomorrow looks like | A baby can look fine and still need checking tonight. | Decide the door before you go to bed, not in the morning. |
The decision tree
A. Any one of these is there now → emergency department, right now
- Hard to wake, will not wake properly, or only moves when touched
- Limp or floppy, or floppy in a way that is new for her
- A fit: staring, stiffening, jerking, or going unresponsive
- Repeated vomiting, or green vomit
- Soft spot bulging, or clearly sunken
- Fast or laboured breathing, grunting, blue lips
- Weak, high-pitched or moaning cry
- Will not feed at all, much less than usual, or refuses the breast or bottle
- Clearly fewer wet nappies than usual
- New swelling or bruise on the head
- Temperature 38 °C or above, or she feels hot or cold and is not herself
- "Just not herself," with no reason you can name
B. None of those, but she is under 3 months, or she is feeding less than her last 24 hours, or she has vomited once, or she is quieter than her usual → call the nurse line now and be seen today.
C. She is alert, feeding as usual, wetting as usual, no marks → still call tonight, and be seen today or first thing in the morning. A baby who looked fine can change over the next hours; that reassessment is the point of the call, not a formality.
Tonight, in about 25 minutes
- Call. Script: "Our baby is ____ weeks old. She was shaken quite hard at about ____, at home, during play. Her head did/did not hit anything. Right now she is feeding, waking and moving as usual. Do you want us to come in today?" Have her age and the time of the event in your hand before you dial.
- Write five lines: event time, what she was doing, any mark, feeds since, wet nappies since. Times only, no amounts.
- Write down what you want to ask: do you want to examine her eyes; what must bring us straight back; who do we call tonight or tomorrow morning, and what is that number.
- Change how she is held tonight. Her head is always supported in your hand. Slow walking, dim room, quiet. If she will not settle, put her on her back in her cot, walk out of the room, and take five minutes.
- Put both adults on the same rule, out loud: no shaking, no jiggling the head, no tossing, not to stop crying, and no bouncing her in arms or in a bouncer. If either of you feels you are about to lose control, put her down in the cot and step away, and hand her to the other adult. That is the correct action, not a failure.
- Sleep plan: on her back, own flat cot, no pillow, no loose blanket, no toys, same room as an adult.
Do not
- Do not shake, jingle, bounce or toss her head — not in play, not to stop crying.
- Do not "sleep it off" or wait for the morning to decide.
- Do not force food, water or medicine into her to see how she reacts, and do not start anything new — no water, no new food, no new medicine, nothing to test her with.
- Do not change, add or stop any prescribed medicine on the back of this.
- Do not try to check her eyes yourself, press on a swelling, or push on her head.
- Do not hunt online for a syndrome name to match. It cannot be confirmed at home, and it costs you the night.
- Do not lose the night to proving who was right about how hard it was.
What 24 hours from now would look like if this is going well
- The nurse line or the doctor has heard the word *shaken* in your own words, and given you a number to call back.
- Someone qualified has looked at her eyes, if the clinician said to.
- Her feeding, waking and wet nappies match her usual, written down with times.
- Nobody has shaken or jiggled her since, and both adults can say the hand-off rule out loud.
- You know the signs that mean the emergency department, and you have the words to say at the door.
This is not a diagnosis and it is not a cure — it is what "handled well" actually looks like, and it is a reasonable thing to aim for tonight.
Say this at the door
"Our baby is ____ weeks old. She was shaken hard at about ____ at home during play. Her head did/did not hit anything. She is alert / drowsy / feeding less. I am worried about a head injury."
If you are worried this could happen again when you are not there, say that to the nurse line too — "I am worried she will be shaken again" is a sentence they can act on.
Two things I still need
How old is she in weeks, and was she born early? That one number changes which branch above she sits in. And which country are you in, so I can give you the exact emergency number and the right nurse line for your area.
Source: rch-cpg https://www.rch.org.au/clinicalguide/guideline_index/Head_injury/