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 ...

How much do you know about your digestive system? Find out by taking this quiz!

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.

infection in the urinary tract irritation or injury of the genital area stones (small masses of minerals) in the urinary tract Urinary tract infections (UTIs) are the most common cause of pain during ...

A night terror (also called sleep terror) is similar to a nightmare, but is far more dramatic. A child having a night terror wakes up screaming and is impossible to ...

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 ...

What Is Breast Reduction Surgery? Breast reduction surgery is a procedure that makes large breasts smaller. It keeps the natural shape of the breast and nipple/areola (small area around the nipple).

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 ...

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 ...

What Is Hand, Foot, and Mouth Disease (HFM)? Hand, foot, and mouth disease (HFM) is a common viral infection that causes painful red blisters in the mouth and throat, and on the hands, feet, and ...

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 ...