If your child swallowed a coin and is breathing normally, not drooling excessively, and not in pain, the coin has most likely reached the stomach and will pass on its own. Most swallowed coins move through the digestive tract without causing harm. Your immediate job is to watch for a short list of warning signs, then monitor your child’s bowel movements over the next several days.
Check for These Symptoms Right Away
A coin that gets stuck in the esophagus (the tube between the throat and stomach) is the main concern. About 80% of coins that lodge in the esophagus get stuck in the upper portion, near the throat. If that happens, your child will usually show clear signs within minutes to hours:
- Drooling or inability to swallow saliva
- Gagging, choking, or coughing
- Refusing to eat or drink
- Chest pain or throat pain
- Vomiting, especially with blood
- Noisy or difficult breathing
Any of these symptoms means you should go to the emergency room. A coin stuck in the esophagus generally needs to be removed if it hasn’t moved within 12 to 24 hours, because prolonged pressure on the esophageal wall can cause ulceration or, in rare cases, perforation.
If your child is completely symptom-free, acting normally, eating and drinking without trouble, that’s a strong sign the coin has already passed into the stomach.
Make Sure It’s Actually a Coin
This matters more than you might think. Button batteries (the small, flat, round batteries found in watches, remote controls, and toys) look almost identical to coins on an X-ray and in a child’s hand. A button battery stuck in the esophagus can cause serious chemical burns to the tissue in as little as two hours, even if the child has no symptoms. Coins cause only mechanical pressure and are far less dangerous.
If there’s any chance your child swallowed a button battery instead of a coin, treat it as an emergency and go to the ER immediately. Doctors can distinguish between the two on an X-ray: a battery shows a distinctive “double rim” or halo appearance, while a coin looks like a solid, uniform disc.
What to Do at Home
If your child seems fine and you’re confident it was a coin, here’s your plan:
Do not try to make your child vomit. Do not give laxatives or try to “push” the coin through faster. These steps aren’t recommended and can cause additional problems. Let your child eat, drink, and go about their normal routine.
Do check every bowel movement for the coin. This is the unglamorous part. You’ll need to inspect your child’s stool until you find it or confirm it’s passed. A plastic fork, a disposable container, or a fine-mesh strainer can help with the task. Most coins pass within a few days, though it can sometimes take up to a week or longer.
If you haven’t found the coin after about a week, it’s worth visiting your pediatrician. They’ll likely order an X-ray to see where the coin is. If it’s still sitting in the stomach, follow-up X-rays once a week are typically sufficient to track its progress. If the coin remains in the stomach after two to four weeks without moving, doctors may recommend removing it with a quick endoscopic procedure (a flexible scope passed through the mouth).
Why Pennies Deserve Extra Attention
Pennies minted after 1982 are made almost entirely of zinc with just a thin copper coating. Stomach acid begins eroding the copper plating immediately, and in lab testing, these pennies developed holes by the second day of exposure. If a post-1982 penny gets stuck in the stomach rather than passing through, the zinc can become toxic relatively quickly, potentially causing stomach irritation or ulcers.
This doesn’t mean a swallowed penny is an automatic emergency. Most pennies pass through before they have time to erode significantly. But it does mean you shouldn’t take a casual “it’ll work itself out eventually” approach. If you know your child swallowed a penny (rather than a dime or nickel), stay on top of stool monitoring and follow up promptly if it hasn’t passed within a week.
What Happens at the ER or Doctor’s Office
If you do need medical evaluation, the first step is usually an X-ray of the neck, chest, and abdomen. Coins show up clearly on X-rays, and the image tells doctors exactly where it is. A coin already in the stomach or intestines in a child with no symptoms is reassuring, and you’ll typically be sent home with instructions to monitor stool.
A coin stuck in the esophagus is handled differently. If it’s been there less than 24 hours and the child is comfortable, some doctors will wait briefly to see if it passes into the stomach on its own. If it doesn’t move, or if the child is symptomatic, removal is straightforward. The doctor passes a thin, flexible scope through the mouth, locates the coin, and pulls it out. The procedure is done under sedation, takes only a few minutes, and children recover quickly.
Age and Size Factors
Coin ingestion is most common in children between ages one and five. Younger children have narrower esophaguses, which means coins are more likely to get stuck before reaching the stomach. A U.S. quarter (about 24 mm across) is more likely to lodge than a dime (about 18 mm) simply because of its size. Larger coins in smaller children carry the highest risk of impaction.
Once a coin reaches the stomach, size matters much less. The opening from the stomach into the intestines is wide enough to pass most coins, and the rest of the digestive tract handles them without difficulty. The overwhelming majority of coins that make it to the stomach pass completely within days.