People with celiac disease can't eat gluten, which is found in many everyday foods, such as bread. Find out more by reading this article for kids.

Kids who have allergies also might have a breathing problem called asthma. Find out more in this article for kids.

Babies sometimes have an allergic reaction to eggs. If that happens, they can't eat eggs for a while. But the good news is that most kids outgrow this allergy by age 5.

Struggling with strawberries? Petrified of peanuts? Sorry you ate shellfish? Maybe you have a food allergy. Find out more in this article for kids.

Hives are red, itchy blotches that can happen for different reasons. Find out more in this article for kids.

Kids with lactose intolerance have trouble digesting a type of sugar found in milk and other dairy foods. But by making smart choices, they can eat delicious foods without feeling sick.

Many kids are allergic to peanuts. Find out more about this problem and how allergic kids can stay healthy.

Many kids are allergic to tree nuts. Find out more about this problem and how allergic kids can stay healthy.

During an allergic reaction, your body's immune system goes into overdrive. Find out more in this article for kids.

Dirty air can be bad news for someone with asthma. Find out more in this article for kids.

Asthma makes it hard to breathe. Find out more in this article for kids.

Use this weekly diary to record your child's asthma symptoms, peak flows, the amount of medicine taken.

Kids who have asthma can and do play sports. Find out how to do it safely in this article for kids.

Weather can affect a person's asthma. Find out how in this article for kids.

If you have asthma, certain things may cause you to cough and have trouble breathing. Find out more about asthma triggers in this article for kids.

How can you prepare for an asthma flare-up? Find out in this article for kids.

Kids who have asthma need to take medicine. But what kind of medicine do they take and what does it do? Let's find out.

Uh-oh. Could your pet be making your asthma worse? Find out more in this article for kids.

Kat doesn't let her asthma get in the way of playing sports. Find out how she does it in this article for kids.

If you have asthma, you need to know how to handle it at school. Find out more in this article for kids.

Smoking (or even breathing in secondhand smoke) can make asthma worse. Find out more in this article for kids.

Going on a trip? If you have asthma, you'll want to be prepared so breathing trouble doesn't spoil your fun. Find out more in this article for kids.

Many people with asthma need to take medicine every day to control their asthma.

Quick-relief medicines are a type of asthma medicine that works quickly.

If you have asthma, you'll want to have an asthma action plan. Find out more in this article for kids.

People use inhalers and nebulizers to get asthma medicine into their lungs. Find out more in this article for kids.

If you have asthma, you want to breathe easy at home. Find out how in this article for kids.

Lots of kids wet the bed. Find out more in this article for kids.

A urinary tract infection happens when any part of your urinary system (kidneys, ureters, bladder, urethra) gets infected.

Sickle cell disease is a disease of the blood. Red blood cells are shaped like sickles, and can get stuck, especially inside smaller blood vessels.

People with hemophilia have blood that doesn't clot the way it should. That means that they bruise and bleed easily.

What does it mean when a kid has anemia? Learn about anemia, why kids get it, and how it's treated in our article for kids.

Kids can get a kind of arthritis that causes joint pain. Find out more in this article for kids.

Some injuries will heal best if a cast is used. Find out how they work and how to take care of them in this article for kids.

Broken bones have an amazing ability to heal, especially in kids. Here's how.

A splint is a support device that keeps an injured area from moving. Doctors often use splints to hold bones and joints in place so they can heal after a break.

Autism spectrum disorder makes it hard for kids to learn and communicate. Find out more in this article for kids.

People who have epilepsy have seizures. You might also hear a seizure called a convulsion, fit, or spell.

You have memories, but how do they form and stay in your brain? Find out in this article for kids.

Tourette syndrome is a condition that causes tics -- movements or sounds that are repeated over and over. Learn more about Tourette syndrome in this article for kids.

A coma can be difficult to understand, especially because it may look like the person is just sleeping. Find out what a coma is and how people recover from them.

Bell's palsy is a condition that causes problems with the nerves in a person's face.

Cerebral palsy is a condition that affects the brain and how it talks to the muscles.

Hydrocephalus happens when the fluid that cushions the brain builds up inside the head.

The meninges cover and protect the brain and spinal cord. Meningitis happens when the meninges swell or get irritated.

Chemotherapy is the use of special medicines to treat cancer.

When a friend has cancer, you might not know what to do or say. Get some ideas in this article for kids.

If you have diabetes, you might think you shouldn't eat carbohydrates (carbs) at all. But all kids, including kids with diabetes, can and should eat carbs as part of a healthy diet.

People who have diabetes have to pay special attention to what they eat and need to stay aware of the amount of sugar in their blood. So what's it like to have diabetes? Just ask Chandler!

Too much glucose in the blood can be unhealthy, especially for kids with diabetes. Learn about diabetes and high blood sugar here.

Dealing with diabetes can stir up a lot of different emotions. Find out more about dealing with your feelings if you're a kid with diabetes.

Are you on your own at school when you're dealing with diabetes? Not at all. Your teachers, coaches, school nurse, and friends can help you out.

Checking your blood sugar levels is a really important part of managing diabetes. Knowing those levels will help you keep your blood sugar under control - and that helps you feel good and keeps you healthy.

Do you know just how important the thyroid is? It helps you grow and affects your energy level.

Diabetes is a disease that affects how the body uses glucose, a sugar that is the body's main source of fuel. Find out more about a kind of diabetes called type 2 diabetes in this article for kids.

Cystic fibrosis affects the lungs and makes it hard to breathe. Find out more in this article for kids.

Everyone's heart makes sounds, but some people have hearts that make more noise than others. Usually, however, these heart murmurs don't mean anything is wrong. Find out more about these mysterious murmurs.

This article helps kids understand how incentive spirometry works. An incentive spirometer is a way for kids to do breathing exercises to help them get better after some types of surgery or when they have an illness.

Your heart beats and sends blood all around your body. Find out more about the heart, from A to Z, in this glossary.

Anyone can get athlete's foot. Find out how to avoid this itchy skin condition in this article for kids.

Chickenpox is a virus that causes red, itchy bumps. Find out more in this article for kids.

You might have had a cold sore and wondered, what are they exactly? Find out in this article for kids.

It's sneaky, it's silent, and it can permanently harm your liver. Read this article for more information on hepatitis.

Impetigo is a strange-sounding word that might be new to you. It's an infection of the skin caused by bacteria. Read this article to learn more about it.

Jock itch is a pretty common skin infection of the groin and upper thighs. It is usually affects teens, but sometimes kids can get it. Find out what it is and how to prevent it in this article for kids.

The best way to prevent Lyme disease is to prevent tick bites. Find out more about this disease and how to keep those ticks away.

Kissing is just one of the ways that someone can spread mononucleosis. Most people who get mono are teens or young adults, but kids can get it too.

Pinkeye is the most common eye problem kids can have. It causes redness, itching, inflammation, and pus to collect in the eyes.

It's gross to think about but did you know that tiny worm eggs could be under your fingernails? Learn more about how to protect yourself from getting pinworms.

Ringworm isn't a worm at all - it's the name for a type of fungal skin infection. The good news is that ringworm is easy to treat.

Strep throat gives you a sore throat and makes it hard to swallow. Find out more in this article for kids.

You know they can hurt you, but what are these invisible creatures? Find out in this article for kids.

Get the facts on HIV and AIDS in this article just for kids.

A middle ear infection happens when germs like bacteria and viruses get in your middle ear and cause trouble. Read this article to find out more.

Bell's palsy is a condition that causes problems with the nerves in a person's face.

Bronchiolitis is an infection that affects tiny airways in the lungs, which can make it hard to breathe.

Chickenpox can make you itch like crazy. Find out why in this article for kids.

A urinary tract infection happens when any part of your urinary system (kidneys, ureters, bladder, urethra) gets infected.

Respiratory syncytial virus, or RSV, is an infection of the lungs and breathing passages.

Scarlet fever is an infection caused by the same bacteria that cause strep throat. It's called scarlet fever because it causes a red, bumpy rash over most of the body.

Sinusitis is an infection of your sinuses — the air-filled spaces found in the bones of the face around the nose.

ADHD is a medical condition that makes it harder for kids to stay focused. Kids with ADHD can also be more fidgety than other kids their age. This article for kids explains how doctors decide a kid has ADHD and what they can do about it.

Being mindful means having your mind on what you are doing. It's the opposite of rushing or doing too many things at once. When you feel calm, take your time, and have your mind on what you’re doing, it’s easier to get things done and do your best.

Kids with Down syndrome may have medical problems and trouble learning. But many can go to regular schools, make friends, enjoy life, and get jobs when they're older.

Dyslexia is a problem that makes it difficult for a kid to read. With some help and a lot of hard work, a kid who has dyslexia can learn to read and spell.

Having a learning disability doesn't mean you can't learn. The trick will be figuring out how you learn best.

Being mindful helps people do better in just about every part of life. These exercises are for kids who want to practice and build good mindfulness skills.

OCD causes kids to have stressful worry thoughts and worry habits. Therapy helps kids get over these stressful thoughts and habits. Kids who have worries and fears should let a parent know so they can help.

Therapy is part of the treatment for most kids who have ADHD. This article is for kids who want to find out how it helps.

Kids who can't see, or can't see well, learn to live without using their eyes. To learn more about visual impairment and what causes it, read our article for kids.

Loud music can cause temporary and permanent hearing loss. Learn how to protect your ears so you won't be saying, "Huh? What did you say?"

Sometimes the different parts of the eye don't work together the way they should. When this happens, people wear glasses or contact lenses. Find out more in this article for kids.

Strabismus is when someone's eyes don't look straight ahead. It might look as if the person has one crossed eye. Find out more in this article for kids.

Do you or does someone you know ever have a hard time getting words out? Get the whole story on stuttering and other speech problems in this article for kids.

Hearing loss happens when there is a problem with the ear, nerves connected to the ear, or the part of the brain that controls hearing. Someone who has hearing loss may be able to hear some sounds or nothing at all. To learn more, read this article for kids.

If you're almost a teen, chances are pretty good that you have some acne. About 8 in 10 preteens and teens have acne, along with many adults.

Anyone can get athlete's foot. Find out how to avoid this itchy skin condition in this article for kids.

Ouch! What are blisters? Find out in this article for kids.

Everybody has dry skin once in a while, but eczema is more than just that. If your skin is dry, itchy, red, sore, and scaly, you may have eczema. Learn more about this uncomfortable condition and what you can to do stop itching!

Hives are red, itchy blotches that can happen for different reasons. Find out more in this article for kids.

Impetigo is a strange-sounding word that might be new to you. It's an infection of the skin caused by bacteria. Read this article to learn more about it.

Jock itch is a pretty common skin infection of the groin and upper thighs. It is usually affects teens, but sometimes kids can get it. Find out what it is and how to prevent it in this article for kids.

Poison ivy can give you a nasty rash. Find out more about it - and the other plants that can make you itch - in this article for kids.

Learn about rashes in a flash. Check out our article just for kids!

Ringworm isn't a worm at all - it's the name for a type of fungal skin infection. The good news is that ringworm is easy to treat.

You may be young, but you probably already have a scar or two. But why did you get them? How can you prevent them? Find out in this article written just for kids!

Ringworm isn't a worm at all. It's an infection on the skin or nails caused by a fungus.

People with celiac disease can't eat gluten, which is found in many everyday foods, such as bread. Find out more by reading this article for kids.

If you aren't pooping like usual, you could be constipated.

Did you ever eat something that made you feel ooky? It might have been food poisoning.

Got tummy troubles? Indigestion is a common condition that many people - even kids - have at one time or another. Find out more in this article for kids.

It's normal to get a stomachache once in a while, but some kids have something more serious called inflammatory bowel disease (IBD). Find out more about it.

Having irritable bowel syndrome can make a kid feel awful. The good news is that kids can take steps to feel better.

Salmonellosis is an illness caused by a bacteria found in raw food, soil, water and the bowel movements of some animals, including reptiles. Find out how to prevent this illness.

GERD, or gastroesophageal reflux disease, is when the stomach's contents flow back up into the esophagus

Appendicitis happens when a part of the digestive system called the appendix gets inflamed or swells up.

How does your breath smell? Find out how to keep it smelling sweet in this article for kids.

Braces are a fact of life for many kids. Find out how they work and how to take care of them.

Have you ever been rankled by a canker sore? If you have, you know that these small mouth sores can cause major pain.

You might have had a cold sore and wondered, what are they exactly? Find out in this article for kids.

An orthodontist prevents and treats mouth, teeth, and jaw problems using braces, retainers, and other devices.

If your tonsils get infected, it can make your throat feel very sore. Find out more in this article for kids.

Retainers are really common. In fact, most kids have to wear a retainer for at least a little while after getting their braces taken off. Find out more.

Cavities are small holes in your teeth that need to be filled. Find out what causes tooth decay and how dentists handle it.