Histamine (HISS-tuh-meen): Histamine is a substance that the body releases during an allergic reaction. It can cause allergy symptoms that affect the eyes, nose, throat, skin, digestive system, and ...

The digestive process starts even before the first bite of food. Find out more about the digestive system and how our bodies break down and absorb the food we eat.

Parents often associate sexual development with the teen years. But kids develop an emotional and physical foundation for sexuality in many subtle ways from infancy. Physical and emotional changes ...

What Are Cochlear Implants? A cochlear implant is a surgically placed device that helps a person with severe hearing loss hear sounds. The cochlea is a snail-shaped part of the inner ear. It turns ...

Coughing is a healthy reflex that helps clear the airways. A severe cough or one that lasts more than a week requires a medical checkup. But many coughs are caused by a virus that just needs to run ...

It's important to protect kids from sharp and dangerous items around and outside the home. Here are ways to prevent cuts and other injuries.

It may seem scary to go to a hospital, but doctors and nurses are there to help people who are sick or hurt feel better. Read our article for kids to find out what happens inside a hospital.

What Are Gyn Checkups? Gynecology ("gyn" for short) is a medical field that focuses on the female reproductive system. A gyn checkup is a yearly health check — like a regular eye exam or dental ...

What's the Digestive System? Even before you eat, when you smell a tasty food, see it, or think about it, digestion begins. Find out how the digestive system works, from start to finish, in this video ...

What Are Helicobacter pylori? Helicobacter pylori (H. pylori) are a type of bacteria. These germs are a common cause of digestive illnesses, including: gastritis: the irritation and inflammation of ...

Ever wonder how your eyes work? This article for kids takes you from the pupil to the retina and beyond.

Self-confidence and self-esteem are quiet inner strengths. They mean knowing you are a good person – someone who is likable, worthy, and capable.