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 ...

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 ...

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 ...

What Does the Heart & Circulatory System Do? If you've ever wondered how your heart works, this movie has the answer. And special thanks to the Fred J. Brotherton Charitable Foundation for supporting ...

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 ...

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

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 ...

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 ...

I have lots of little bumps (almost like goosebumps or whiteheads) on my penis. Is this a sign that something is wrong? If you've never had sex, little white bumps on the shaft of the penis may be ...

This is a general outline of the milestones on the road to reading success. Keep in mind that kids develop at different paces and spend varying amounts of time at each stage. If you have concerns, ...

Pneumonia is an infection of the lungs. Normally, the small sacs in the lungs are filled with air. In someone who has pneumonia (nu-MOH-nyuh), the air sacs fill up with pus and other fluid. Viruses, ...

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