If your child swallowed something that's not sharp or otherwise potentially dangerous and it doesn't seem stuck in his throat, he'll probably do just fine on his own, passing the object in his stool and ending up no worse for the experience.

Helicobacter pylori (H. pylori) is a type of bacteria that causes infection in the stomach. It is found in about two-thirds of the world's population. It may be spread by unclean food and water, but researchers aren't sure. It causes Peptic ulcers and can also cause stomach cancer.