- Parents Home
- Para Padres
- A to Z Dictionary
- Allergy Center
- Asthma
- Cancer
- Diabetes
- Diseases & Conditions
- Doctors & Hospitals
- Emotions & Behavior
- First Aid & Safety
- Flu (Influenza)
- Food Allergies
- General Health
- Growth & Development
- Heart Health & Conditions
- Homework Help Center
- Infections
- Newborn Care
- Nutrition & Fitness
- Play & Learn
- Pregnancy Center
- Q&A
- School & Family Life
- Sports Medicine
- Teens Home
- Para Adolescentes
- Asthma
- Be Your Best Self
- Cancer
- Diabetes
- Diseases & Conditions (for Teens)
- Drugs & Alcohol (for Teens)
- Flu (Influenza)
- Health Essentials (for Teens)
- Homework Help
- Infections (for Teens)
- Managing Your Weight
- Medical Care 101
- Mental Health
- Nutrition & Fitness
- Q&A
- Safety & First Aid
- School, Jobs & Friends (for Teens)
- Sexual Health (for Teens)
- Sports Medicine
- Stress & Coping
- Videos (for Teens)
kids
What is Asthma? (Video)
You probably know that asthma is an illness that causes breathing problems. But what happens in the lungs when someone has asthma? Watch this video to find out.

Asthma
Learn more about asthma.
Note: All information is for educational purposes only. For specific medical advice,
diagnoses, and treatment, consult your doctor.
© 1995- The Nemours Foundation. KidsHealth® is a registered trademark of The Nemours Foundation. All rights reserved.
Images sourced by The Nemours Foundation and Getty Images.