Definition of Foreign object - inhaled or swallowed:

If you breathe a foreign object into the respiratory tract, it may become stuck and cause breathing or airway problems, as well as inflammation and infection.

If swallowed, a foreign object may become stuck along the gastrointestinal (GI)tract, which can lead to infection or bleeding.

See also: Choking

Considerations:

These events can occur at any age, but are most common in children ages 1 to 3.

Causes:

Certain foods (nuts, seeds, popcorn) and small objects (buttons, beads) are easily inhaled by young children. Such objects may cause either partial or total airway blockage.

Coins, small toys, marbles, pins, screws, rocks, and anything else small enough for infants or toddlers to put in their mouths can be swallowed. If the object passes through the esophagus and into the stomach without getting stuck, it will probably pass through the entire GI tract.