"Eighty to 90 percent of the time, coins pass unobstructed," says Dr. Kettlehake. "They usually pass in less than four to five days, often within 48 hours." In these cases, you should still consult with your child's doctor or after-hours line immediately.

How long does it take for a swallowed coin to pass?

If the coin has passed through the throat, into the stomach, it should pass out from the system in less than 4-5 days, and usually within 2 days. A coin that is stuck will induce stomach or chest pain, drooling, trouble swallowing, vomiting, and fever.

What happens if you accidentally swallow a coin?

Ingesting a coin can lead to impaction, which is what happens when the coin is not passed through the bowel and then has to be surgically removed. The study also shows the number of button battery ingestions has risen by more than 90%.