My child swallowed a piece of lego 1 to 2 years?

What the evidence says

Most of the time, a swallowed Lego piece is not dangerous. Kids between about six months and three years old put things in their mouths a lot, and doctors see this kind of thing very often. Plain plastic Lego bricks are small, smooth, and not sharp, so they usually slide through the stomach and intestines and come out in the poop within a few days, without you needing to do anything.

The things that make a swallowed object risky are being a battery, a magnet, something sharp, or something larger than about an inch across. A regular Lego brick is none of these. However, some Lego sets include tiny magnets in special pieces, so check whether the piece your child swallowed has a magnet in it, because magnets need urgent medical attention even if only one was swallowed, since a second one already in the body could pull toward it and injure the intestines.

You do not need to search through your child's diapers or stool to find the piece. Doctors say this is unpleasant and not usually helpful. Instead, just keep an eye on your child over the next few days for warning signs.

Take your child to be seen urgently if they start drooling a lot, have trouble swallowing, refuse to eat or drink, vomit, complain of chest or throat pain, seem to be in pain, have swelling of the belly, or pass blood in their stool. These signs can mean the piece is stuck somewhere it shouldn't be. If you did not actually see the swallowing happen and are not sure what was swallowed, or if the piece was sharp, a battery, or a magnet, call your doctor or go to the emergency department rather than waiting.

Going forward, it helps to check Lego sets for age labels, since sets made for older kids often have smaller loose pieces, and to keep small pieces away from children under three when possible.