Plantar fasciitis (PLAN-ter fash-ee-EYE-tus) is pain and inflammation on the bottom of the foot and heel from too much pressure on the foot. It tends to happen in kids and teens who do a lot of ...

What Is Iliotibial Band Syndrome? Iliotibial (IT) band syndrome is an overuse or repetitive stress injury to the knee or hip that can happen someone bends their knee a lot. It tends to happen in ...

What Is Hypotonic Cerebral Palsy? Cerebral palsy (CP) affects muscle movement and control. People with CP have it for life. Hypotonic CP is rarer than other types of CP. In rare cases, CP happens ...

Rumination syndrome happens when just-swallowed food comes back up into the mouth from the stomach. When this happens, a person chews and swallows the food again or spits it out. Rumination syndrome ...

How Does Air Enter the Respiratory System? Air enters the respiratory system through the nose or the mouth. If it goes in the nostrils (also called nares), the air is warmed and humidified. Tiny hairs ...

An erection is when the penis gets hard because sponge-like tissue in it fills with blood. Erections tend to make the penis get bigger and stand away from the body. Erections can go away on their own ...

¿Qué es el síndrome de rumiación? El síndrome de rumiación consiste en que la comida recién ingerida regresa a la boca desde el estómago. Cuando esto ocurre, la persona mastica y se vuelve a tragar la ...

Most blood tests take only a few minutes. They’re done at some doctor’s offices, and at community labs, diagnostic centers, and hospitals. A doctor, nurse, or phlebotomist (fleh-BOT-eh-mist, someone ...

Splenic sequestration (SPLIN-ik see-kweh-STRAY-shen) happens when too many blood cells get stuck in the spleen. It is a type of emergency that can happen to people, usually kids, who have sickle cell ...

Girls have lots of questions about the body changes of puberty. When will my breasts grow? What's the "normal" age to get your first period? Watch this video and find out!

Sexually transmitted diseases (STDs) are infections spread from person to person during sex (vaginal, oral, or anal) or close sexual contact. STDs are also called sexually transmitted infections, or ...

Your baby is finally coming home from the hospital after a stay in the NICU. Before you leave, learn all you can from the care team about caring for your baby so that you can feel confident at home.