By the time a child can crawl, they will put almost anything that fits into their mouth. Most of the time, the result is a wet, slightly chewed object handed back to you with a grin. Some of the time, you find something missing — a battery from a remote, a small magnet from a fridge set, a coin from a dropped wallet — and you don't know whether it's gone in.
The triage is short, and the time pressure depends entirely on what was swallowed. A button battery in the oesophagus damages tissue within two hours. A magnet on its own is a watch-and-wait; two magnets is surgery. A coin is usually nothing. The job is to know which is which, fast. Healthbooq gives parents straightforward, evidence-based first-aid guidance for the moments that matter.
The first decision: airway
Before anything else — is the child breathing normally?
If the child is choking — clutching the throat, can't speak or cry, soundless gagging, blue around the lips — the object is in the airway, not the stomach, and the response is choking first aid:
- Infants under 1 year: alternate 5 firm back blows (head down across your forearm, heel of the other hand between the shoulder blades) with 5 chest thrusts (two fingers on the lower half of the breastbone). Do not use abdominal thrusts in infants — they can damage the liver.
- Children 1 year and older: 5 back blows alternating with 5 abdominal thrusts (the Heimlich manoeuvre). Stand or kneel behind, fist between umbilicus and lower ribs, sharp inward and upward thrusts.
- If they go unresponsive: start CPR (30 compressions, 2 breaths) and shout for someone to call 999/911 while you continue.
If a bystander is available, send them to call emergency services on the first sign of true choking — don't wait. If you're alone, try a couple of cycles of back blows and thrusts first; if no clearing, then call.
If the child is breathing, talking, coughing forcefully, or crying — the airway is open. Do not put your fingers in the mouth blindly to fish for the object; you can push it deeper. Watch them, keep them calm, and move to the next decision.
The second decision: what was it?
The thing that determines urgency is the object, not the symptoms. Symptoms can take hours to develop with the dangerous ones, and by then the damage is done.
The "drive now, don't wait" list
These three ingestions need a hospital immediately, before any symptoms appear:
1. A button or coin-cell battery. These are the small, flat lithium discs found in remote controls, car key fobs, hearing aids, kitchen scales, novelty greetings cards, LED tea lights, and many cheap children's books and toys. The CR2032 (3 V, ~20 mm) is the most dangerous and most common. Saliva closes the circuit between the two faces of the battery, generating hydroxide ions that burn through tissue. Damage to the oesophagus can begin within 2 hours, and full-thickness burns are documented within 4–6 hours. Late complications include perforation into the aorta and major airway. Children have died from delayed presentations.
What to do, in order:
- Go to A&E immediately. Do not wait for symptoms.
- On the way (or while waiting if you can do so safely without delay): give honey if the child is over 12 months and the battery was swallowed within the last 12 hours. Two teaspoons (10 ml) every 10 minutes, up to six doses. Honey coats the battery and slows the burn. Do not give honey to babies under 1 because of botulism risk; do not let honey delay your travel to hospital.
- Take the packaging or matching battery with you so the team know the size and chemistry.
- The hospital will X-ray to localise (a button battery has a characteristic "double rim" or "halo" sign that distinguishes it from a coin). If it's lodged in the oesophagus, it must come out by endoscopy within hours.
2. More than one magnet, or one magnet plus any metal object. Small high-strength rare-earth magnets (the kind in adult fidget toys, magnetic construction sets, magnetic dart games, spinner toys, fake nose/tongue piercings) are catastrophic when more than one is swallowed. They attract through bowel walls, pinch tissue between them, and within 24–48 hours cause perforation, peritonitis, and sepsis. A single magnet plus a coin or paper clip does the same thing.
What to do:
- A&E immediately, even with no symptoms.
- The team will X-ray, often plain abdominal films plus an upright. Two or more magnets need urgent endoscopic or surgical removal.
- A single confirmed magnet may be observed with serial X-rays — but you need the imaging to know.
3. Sharp objects. Open safety pins, sewing needles, broken glass, fish bones over 2–3 cm, screws with sharp threads, and the tongues of broken zippers. The risk is perforation as the object passes through. Even a passed sharp object can perforate later.
What to do:
- A&E within hours; do not delay.
- The team will image and decide whether to retrieve endoscopically.
The "ring or go in for advice" list
These need professional input but rarely a blue-light dash:
- Coins. Most pass within 4–6 days without trouble. The exceptions: a coin lodged in the oesophagus (the child drools, refuses to swallow, or has chest discomfort) needs removal within 24 hours; coins larger than ~25 mm can lodge even in older children. UK 50p, US quarters, and €2 coins are the usual culprits. X-ray confirms location.
- Small smooth toy parts, beads, plastic Lego pieces. Almost always pass uneventfully if smaller than ~20 mm. A coin-sized rule of thumb: if it's smaller than a 10p coin and smooth, watch and pass. If it's larger or it lodges, get reviewed.
- Food bones (chicken, lamb, fish). Most fish bones are soft enough to pass; a sharp fish bone stuck in the throat (persistent prick or pain when swallowing) needs ENT review.
- A medication or any chemical. This is poisoning, not a foreign body. Ring the National Poisons Information Service via 111 (UK) or Poison Control on 1-800-222-1222 (US) immediately, with the bottle to hand. Have the child's weight and the time of ingestion ready. Don't induce vomiting unless told to — for many substances (caustics, hydrocarbons) it makes things worse.
The "watch and pass" list
A single magnet, a smooth small object, a coin known to have reached the stomach — for these, the standard plan is:
- Keep the child eating and drinking normally.
- No special diet, no laxatives.
- Check stools; the object usually appears within 3–7 days. Most parents see it within 4 days.
- Return for review (or A&E) if the child develops vomiting, abdominal pain, fever, blood in stool, or refusal to eat.
- A coin or single magnet that hasn't passed in stool by day 4–7 deserves a follow-up X-ray to confirm it's moving.
Specific symptoms that change the picture
Even with a "watch and pass" object, certain symptoms upgrade urgency:
- Drooling, refusal to swallow, chest pain or pressure, regurgitation of fluid: the object is stuck in the oesophagus. Needs imaging and likely removal.
- Vomiting (especially if it contains blood) or refusing to eat or drink: seek review.
- Belly pain that doesn't settle, or worsens: review.
- Fever, lethargy, looking unwell: review.
- Blood in stool or vomit: A&E.
- Sudden coughing or wheezing well after the swallow: the object may have been aspirated rather than swallowed. Needs review.
Note: a child who appears completely well after a button battery, multiple magnets, or sharp object swallow is still an emergency. The window for safe intervention is short and entirely independent of how the child looks.
What not to do
- Don't try to make them sick. Vomiting can cause the object to reach the airway, and for caustic substances vomiting causes a second burn on the way back up.
- Don't give bread, banana, or "anything sticky" to push it down. This is folk advice. Pushing an object further into the oesophagus or gut doesn't help and can make endoscopic retrieval harder.
- Don't give activated charcoal at home. It's used in hospital for some poisonings, not for foreign objects.
- Don't blindly sweep the mouth with a finger. You can push the object further in, or trigger a gag and aspiration.
- Don't assume "they're playing fine" means it's fine. With batteries, magnets, and sharps, the child can look perfect for hours and then deteriorate.
At the hospital — what to expect
When you arrive, give the staff the most useful information first: what you think was swallowed, when, and whether you saw it. If you have a matching object — the battery packaging, an identical magnet, the rest of the broken toy — bring it. It saves an hour of detective work.
The team will typically:
- Take a focused history, age and weight.
- Check airway and breathing.
- X-ray (often chest and abdomen). For a button battery, lateral and PA views to confirm location and the diagnostic "halo" sign. For magnets, count them — and remember that two stacked magnets can look like one on a single view.
- Decide between endoscopic removal (general anaesthetic, retrieval through the mouth), surgical removal (rare), or observation with serial imaging.
- Admit for observation if the object is in the stomach but the child has any symptoms.
Numbers worth having before you need them
Programme these into your phone now:
- 999 (UK) / 911 (US) — life-threatening emergency.
- 111 (UK) — non-life-threatening medical advice; press 1 for poisoning advice (NPIS).
- Poison Control 1-800-222-1222 (US) — 24/7.
- Your GP or paediatrician's after-hours number.
- National Battery Ingestion Hotline (US): 1-800-498-8666 — 24/7, run by the National Capital Poison Center, free advice from clinicians for any battery ingestion.
Prevention is most of the safety budget
Knowing what to do is the small part; not having to do it is the big part. The high-yield prevention measures, in roughly the order of how much they reduce risk:
- Lock down the button batteries. Every device that takes a CR2032 (or similar) needs a screwed battery compartment. If the door isn't screwed shut on a remote, kitchen scale, novelty card, or LED tea light — bin it or tape it shut. Loose spare batteries belong in a high cupboard, in their original packaging. The single highest-yield change in any home with a child under 6.
- Lose the small high-strength magnet sets. Buckyballs-type adult fidget toys, magnetic dart games with detachable magnets, magnetic fake piercings. If you have them, they leave the house — not "the high shelf", out of the house. Several countries have banned them outright.
- Coins out of low pockets, low handbags, low coffee tables. A wallet on the coffee table is a coin dispenser to a 14-month-old.
- Toy audit quarterly. Loose buttons, eyes, wheels, broken parts. Anything that fits inside an empty kitchen-roll inner is a choking and ingestion hazard for under-3s.
- Dropped pills are a red alert. Get on the floor before unsupervised playtime resumes. Especially: iron tablets, blood pressure tablets, sleeping pills, paracetamol — all toxic to small children at very small doses.
- Visiting grandparents. The most common ingestion environment outside the home. Walk through their house once with a 3-year-old's eyes — pillbox by the bed, sewing kit on the chair, hearing-aid batteries on the bedside table.
For older toddlers and preschoolers, simple language helps but does not replace prevention: "We don't put small things in our mouths. If you find something, bring it to me." Children under three cannot reliably remember a rule under the pull of curiosity.
What to do, on one page
- Choking? → choking first aid, call 999/911.
- Button battery? → A&E now. Honey en route if over 1 and within 12 hours.
- ≥2 magnets, or magnet + metal? → A&E now.
- Sharp object? → A&E now.
- Medication or chemical? → Call Poisons (111 / 1-800-222-1222).
- Coin or smooth small object, no symptoms? → Ring GP or NHS 111 for guidance; usually watch and pass over 3–7 days.
- Symptoms developing later (drooling, vomiting, pain, fever, blood) → review.
Most ingestions end with the parent finding the object in a nappy three days later. The handful that don't have a recognisable shape, and the difference between a good and a bad outcome is usually whether a parent recognised that shape in the first hour.
Key Takeaways
Three ingestions are time-critical and need a hospital within minutes, not hours: a button battery (causes oesophageal burns within 2 hours, can perforate the aorta), more than one magnet or a magnet plus any metal object (attract through bowel walls), and any sharp object. Most other small swallowed objects — coins, smooth plastic toy parts, beads — pass through the gut over a few days without intervention. The decision tree is short: is the airway blocked? Is it a battery, magnets, or sharp? Is the child symptomatic? Each branch has one right answer, and most of them aren't 'wait and see'.
