Nemours Children's Health is committed to transforming the health of all kids. KidsHealth.org was founded in 1995 by Nemours pediatrician Neil Izenberg, MD. Since then, Nemours® KidsHealth® articles, ...

Hepatitis B is a liver infection caused by the hepatitis B virus (HBV). In some people, HBV stays in the body, causing long-lasting disease and long-term liver problems. The younger someone is when ...

Nervous System Say: NER -vus SIS -tem The nervous system controls everything you do, including breathing, walking, thinking, and feeling. This system is made up of your brain, spinal cord, and all the ...

What's the Endocrine System? The endocrine system is made up of glands that make hormones. Hormones are the body's chemical messengers. They carry information and instructions from one set of cells to ...

Our bodies create a lot of heat. Normally, they're cooled through sweating and by heat radiating through the skin. But in very hot weather, high humidity, and other conditions, this natural cooling ...

) is the first sign of sickle cell anemia in some infants. Infection: Kids with sickle cell disease are at risk for some bacterial infections. It's important to watch for fevers of 101°F (38°C) or ...

Ear injuries can affect hearing and balance. That's because our ears not only help us hear, but also keep us steady on our feet. Kids need to hear well to develop and use their speech, social, and ...

A medical record is a history of someone’s health. Most hospitals and doctor’s offices use electronic health records (EHRs, also called electronic medical records or EMRs). An EHR is a computerized ...

Teens who decide to have sex should protect themselves from unplanned pregnancy by using birth control. They also should use condoms every time to protect against sexually transmitted diseases (STDs).

have a very mild anemia. What Are the Signs & Symptoms of Hemoglobin H Disease or Alpha Thalassemia Major? Children with hemoglobin H disease and alpha thalassemia major have symptoms of anemia, such ...

Which part of your body lets you read the back of a cereal box, check out a rainbow, and see a softball heading your way? Which part lets you cry when you're sad and makes tears to protect itself?

Doctors use certain milestones to tell if a baby is developing as expected. There's a wide range of what's considered normal, so some babies gain skills earlier or later than others. Babies who were ...