The tip, or head, of the penis is called the glans. A number of conditions can cause the glans to become inflamed, including infections; certain diseases; injuries; and allergic reactions to ...

Carbohydrates are the body's most important and readily available source of energy. They're a necessary part of a healthy diet for both kids and adults. The two main forms of carbs are: simple ...

Down syndrome, also called trisomy 21, is a chromosomal condition in which extra genetic material causes delays in the way a child develops, both mentally and physically. Kids and teens with Down ...

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 ...

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 ...

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!

Earaches are common in kids and can have many causes. Here’s why they happen and what to do when your child complains of ear pain. Give acetaminophen or ibuprofen as needed to ease pain (check the ...

Can I shave my pubic hair? Is it safe? Shaving is one way to remove pubic hair. It is fairly inexpensive, and you can do it yourself. Go slowly, pulling skin taut before running the razor over the ...

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 ...

Flat feet are feet that do not have an arch. The middle of the foot touches the ground. Feet with no arches is the main sign of flat feet. Sometimes, flat feet can cause foot, ankle, or knee pain.

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 ...

Aural atresia is when a baby is born without an ear canal. The baby's eardrum either didn't form normally or is missing. There also are problems with the middle ear bones (called ossicles). The parts ...