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 ...

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 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 ...

¿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 ...

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 ...

It’s normal for people to masturbate (touch or rub their own genitals because they like the way it feels). Some people do it to relieve stress or tension. It’s nothing to be ashamed of or embarrassed ...

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!

COVID-19 usually is milder in kids than in adults, though some children have gotten pretty sick from it. Many parents wonder what to do if their child gets sick. Here's what you need to know.

Both the brain and the spinal cord are protected by bone: the brain by the bones of the skull, and the spinal cord by vertebrae, a set of ring-shaped bones. They're both cushioned by layers of ...

A period is when blood comes out through a girl's vagina. It is a sign that she is getting close to the end of puberty. Puberty is when your body goes from looking like a kid's into looking more like ...

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 ...