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 ...

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 ...

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!

Why are my breasts different sizes? Is there anything I can do about it? It is normal to have different sized breasts. If you have just started developing breasts, one breast may grow more quickly ...

using saunas or hot tubs taking very hot, long baths and showers using electric blankets or heating pads becoming overheated when outside in hot weather or when exercising Instead of hot tubs or ...

What Is a Group A Strep Infection? Group A strep (GAS) is short for group A streptococcus, a type of bacteria. These bacteria usually live harmlessly on the skin and in the nose and throat. Sometimes ...

Many things can lead to hearing loss, but often, no cause is found. Hearing loss is more likely if a child: Some hearing problems come on gradually after birth or show up later in life. If you are ...

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 ...

Is it Safe to Use Household Chemicals During Pregnancy? Some household cleaners and chemicals are safe to use during pregnancy while others are not. Chemicals like ammonia and chlorine might cause ...

Alopecia areata (al-uh-PEE-shuh air-ee-AH-tuh) is a condition that causes hair loss on the scalp and sometimes elsewhere on the body, such as the eyebrows and eyelashes. The condition is not ...

What Is a Staph Infection? Staph is the shortened name for Staphylococcus (staf-uh-low-KAH-kus), a type of bacteria. These bacteria live harmlessly on many skin surfaces, especially around the nose, ...

It's normal to feel anxious at times. Most people have had that butterflies-in-the-stomach feeling before doing something like present in class or compete in a sport. That type of anxiety has a ...