The award-winning KidsHealth comes from Nemours, one of the largest nonprofit organizations devoted to children's health. Learn about Nemours.

You love your video games, but how much is too much? Find out in this article for kids.

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 ...

Hepatitis B can move from one person to another through blood and other body fluids. For this reason, people usually get it through unprotected sex or by sharing needles.

Fainting is a loss of consciousness that can be caused by many things. Here's what to do if your child faints or is about to faint.

Before having sex, it’s important to know about birth control and protecting against unplanned pregnancy and sexually transmitted diseases (STDs).

The complete blood count (CBC) is the most common blood test. It analyzes red blood cells, white blood cells, and platelets.

Molluscum contagiosum is a common viral skin infection. For most children, the rash isn't a big deal and goes away on its own over time.

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

Watch this movie about your immune system - the system that keeps you healthy.

Infectious diseases are caused by microscopic germs (such as bacteria or viruses) that get into the body and cause problems. Some — but not all — infectious diseases spread directly from one person to ...

Where would you be without your bones? Learn more about the skeletal system in this article for kids.