An exanthem is a rash or eruption on the skin. "Viral" means that the rash or eruption is a symptom of an infection due to a virus. Many of the infections that cause viral exanthems also can cause ...

Playing sports is a great way to have fun and stay fit. If you play sports, you may need to get a sports physical. A sports physical is a visit to the doctor to make sure it’s safe to play the sport ...

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 ...

As you've probably noticed, puberty comes with all kinds of changes — including the way your body looks and even the way you might think it smells. These changes are a normal part of becoming a woman, ...

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 ...

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 dolor torácico? El dolor torácico puede ser cualquier tipo de molestia o dolor que afecta a la zona del pecho. Puede ser una sensación de opresión, de quemazón o un dolor agudo. A veces ...

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 much do you know about your heart? Find out by taking this quiz!

Heavy metals are elements that are found in soil, water, and the air we breathe. Plants take up these metals as they grow and can end up in the food we eat. Our bodies need some heavy metals (like ...

How Do I Take a Rectal Temperature? The best way to take a temperature in infants and young children is by taking a rectal temperature. Don't worry — it's a simple and safe process.