A peripherally inserted central catheter (PICC line) is a type of central line. A central line (also called a central venous catheter) is like an intravenous (IV) line. But it is much longer than a ...

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 ...

A lot of changes happen as you grow up, especially as you reach puberty (say: PYOO-bur-tee). This is the time when your body begins to develop and change. During puberty, there isn't just one event or ...

It may be tempting to take the summer off and relax, but looking for a job will give you helpful life skills. Finding a job may be hard, but the search will be worth it. Jobs are out there. Even if ...

Myoclonus (my-o-klo-nus) is a sudden, involuntary twitching, jerking, or contraction of a muscle or group of muscles. Muscles are controlled by electrical impulses in the central nervous system.

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!

We see and hear about hearts everywhere. A long time ago, people even thought that their emotions came from their hearts, maybe because the heart beats faster when a person is scared or excited. Now ...

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 ...

Malaise and fatigue often go hand-in-hand and indicate a child is sick or about to become sick. Symptoms can start slowly or appear suddenly depending on the cause. They can be acute (short-lasting) ...

Herd immunity is the idea that when many people are immune to (protected from) a contagious infection, it's harder for that infection to spread in a community. Antibody shots against specific germs ...

What Is a Breath-Holding Spell? A breath holding spell is when a child holds their breath, usually after being angry, frustrated, startled, or in pain. Sometimes the breath holding leads to the child ...

Bullying is a big problem. It can make kids feel hurt, scared, sick, lonely, embarrassed, and sad. Bullies might hit, kick, or push to hurt people, or use words to call names, tease, or scare them. A ...