What Is a Perforated Eardrum? A perforated eardrum is a tear or hole in the ear's tympanic membrane (the eardrum). A perforated (PER-fer-ate-id) eardrum can hurt, but most heal in a few days to weeks.

From enjoying the great outdoors to playing sports safely, here's how to protect yourself and deal with emergencies.

If your child has a serious illness like cancer or a chronic (ongoing) condition like asthma, your doctor might talk to you about enrolling your child in a clinical trial. A clinical trial is a study ...

What Is an Ankle Sprain? An ankle sprain is when the ligaments that support the ankle get overly stretched or torn. It can happen when you step in a hole, twist your ankle while walking or running, or ...

What Is the Respiratory System? When we breathe, the respiratory system takes in oxygen and sends out carbon dioxide. The cells in our bodies need fresh oxygen to stay alive. As cells do their jobs, ...

When blood gets into urine (pee), it's called hematuria (hee-ma-TUR-ee-uh). It's pretty common and usually not serious. There are two types of hematuria: In rare cases, hematuria can be a sign of ...

What Are the Lungs and Respiratory System? The lungs and respiratory system allow us to breathe. They bring oxygen into our bodies (called inspiration, or inhalation) and send carbon dioxide out ...

Testicular torsion is an emergency condition. It happens when the spermatic cord, which provides blood flow to the testicle, rotates and becomes twisted. The twisting cuts off the testicle's blood ...

Are you thinking about volunteering? Planning for life after high school? This section offers help with homework, dealing with bullying, finding a summer job, and lots more.

Did you know you have more than 600 muscles in your body? They do everything from pumping blood throughout your body to helping you lift your heavy backpack. You control some of your muscles, while ...

Glucose is the main type of sugar in the blood and is the major source of energy for the body's cells. Glucose comes from the foods we eat or the body can make it from other substances. Glucose is ...

Reproduction is the process by which organisms make more organisms like themselves. But even though the reproductive system is essential to keeping a species alive, unlike other body systems, it's not ...