Pneumocystis pneumonia (PCP) is a lung infection caused by a fungus. It's rare in healthy people, and usually affects those with a weak immune system. It's the most common infection diagnosed in ...

Your body does some amazing things, so why not put it to the test? Check with a grown-up before trying any of these experiments. Some will require help from an adult.

Some babies are born with a condition called Goldenhar syndrome. It can cause incomplete development of bones in the face, affecting the ears, nose, soft palate, lips, and jaw. Usually, this happens ...

Kids with auditory processing disorder (APD) can't understand what they hear in the same way other kids do. Something interferes with the way the brain recognizes and interprets sounds, especially ...

What Is Respiratory Distress Syndrome? Respiratory distress syndrome (RDS) is a breathing problem that affects newborns, mostly those who are born more than 6 weeks before their due date. The earlier ...

Anorexia (also called anorexia nervosa) is an eating disorder that makes people extremely afraid of gaining weight and gives them a distorted view of their body shape and size. They restrict how much ...

Vaginitis is inflammation (redness, soreness, or swelling) in and around the vagina. The vulva (the area around the opening of the vagina) also might be irritated, in which case it is called ...

Pityriasis versicolor is a fungal skin infection caused by a type of yeast. It's a common cause of skin rash in teens and young adults. It causes lots of round and oval-shaped patches on the skin, ...

Amphetamines (am-FET-eh-meenz) are very addictive stimulants. They speed up functions in the brain and body. They come in pills or tablets. Prescription diet pills also fall into this category of ...

What Does the Heart & Circulatory System Do? If you've ever wondered how your heart works, this movie has the answer. And special thanks to the Fred J. Brotherton Charitable Foundation for supporting ...

Find out how doctors treat asthma, and what you can do to lower the chances of having a flare-up or needing to go the ER.

Normally, RBCs have a round, doughnut shape and move easily through small blood vessels. Sickle cell disease causes RBCs to form in the elongated shape of a sickle, or the shape of the letter "C." ...