[Skip to Content]

Find care at Nemours Children's Health Doctors Locations

Sign Up

MILESTONES NEWSLETTER

Subscribe for trustworthy health information delivered directly to your inbox
Sign Up

Featured Topics For Parents

Sitio para padres
Parents Home
General Health
Growth & Development
Infections
Diseases & Conditions
Pregnancy & Baby
Nutrition & Fitness
Emotions & Behavior
School & Family Life
First Aid & Safety
Doctors & Hospitals
Videos
Expert Answers (Q&A)
All Categories
All Wellness Centers

Nemours KidsHealth® Is Celebrating! We've been providing trusted health information for 30 years. Learn More

Parents Home
Sitio para padres
All Categories
All Wellness Centers

Featured Topics For Kids

Sitio para niños
Kids Home
How the Body Works
Puberty & Growing Up
Staying Healthy
Staying Safe
Dictionary
Health Problems
Illnesses & Injuries
Relax & Unwind
People, Places & Things That Help
Feelings
Expert Answers (Q&A)
Videos
All Categories
All Wellness Centers

Nemours KidsHealth® Is Celebrating! We've been providing trusted health information for 30 years. Learn More

Kids Home
Sitio para niños
All Categories
All Wellness Centers

Featured Topics For Teens

Sitio para adolescentes
Teens Home
Body
Mind
Sexual Health
Food & Fitness
Diseases & Conditions
Infections
Drugs & Alcohol
School & Jobs
Sports
Expert Answers (Q&A)
Staying Safe
Videos
All Categories
All Wellness Centers

Nemours KidsHealth® Is Celebrating! We've been providing trusted health information for 30 years. Learn More

Teens Home
Sitio para adolescentes
All Categories
All Wellness Centers

Search KidsHealth library

Asthma & Allergies

en español: Asma y alergias

Do allergies cause asthma? Learn about the link between these conditions.

Who We Are

About Us

Working With Us

Partners
Editorial Policy
Permissions Guidelines
Media Requests This link opens in a new tab
Contact Us

Legal & Privacy

Privacy Policy & Terms of Use
Notice of Nondiscrimination

All Categories

For Parents
For Kids
For Teens

Wellness Centers

For Parents
For Kids
For Teens

Note: All information on Nemours KidsHealth® is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor. © 1995-2025. The Nemours Foundation. Nemours Children's Health®, Nemours KidsHealth®, KidsHealth®, and Well Beyond Medicine® are registered trademarks of The Nemours Foundation. All rights reserved. Images sourced by The Nemours Foundation and Getty Images.