Print    Email
Decrease (-) Restore Default Increase (+)
  
For Parents
Bookmark and Share

Lea este articulo en Español

My daughter has asthma and I'm worried that her younger brother might develop it, too. He has seasonal allergies and I've heard that allergies can cause asthma. Is this true?
- Elisha

No, allergies do not cause a person to develop asthma. But these two conditions are related, so it's natural to assume that one might lead to the other. Kids with allergies (especially allergies that affect the nose and eyes) are more likely to have asthma than those who don't. The same goes for kids who have a family history of allergies or asthma — they're more likely to develop one or both conditions.

So, based on your son's family history and the fact that he has allergies, he does have an increased risk of developing asthma. But that doesn't mean that he definitely will. Many people with allergies never develop asthma.

Where there might be some confusion about allergies and asthma is that sometimes a person who already has asthma, like your daughter, can have symptoms worsen if she's exposed to specific allergens (things that cause an allergic reaction). In fact, up to three quarters of kids who have asthma also have an allergy to something.

With any kind of allergy, the immune system overreacts to normally harmless substances, such as pollen or dust mites. As part of this overreaction, the body produces an antibody of the immunoglobulin E (IgE) type, which specifically recognizes and attaches to the allergen when the body is exposed to it. When that happens, it sets a process in motion that results in the release of certain substances in the body. One of them is histamine, which causes allergic symptoms that can affect the eyes, nose, throat, skin, gastrointestinal tract, and lungs. When the airways in the lungs are affected, the symptoms of asthma can occur.

Future exposure to the same allergens can cause the reaction to happen again. So, in your daughter's case, it's wise to explore whether allergies may triggering some of her asthma symptoms. Talk to her doctor, who can identify possible triggers. Triggers can be things other than allergens, such as cold air, respiratory infections, or tobacco smoke.

If allergens are found to be an important trigger for her asthma symptoms, do what you can to help your daughter avoid exposure to the allergens involved. (If this doesn't help control the asthma symptoms, the doctor also might prescribe medications or allergy shots.)

And as for your son, do your best to help him avoid any allergy triggers he may have. If you think he's beginning to show the signs of asthma, take him to the doctor for a full evaluation.

Reviewed by: Elana Pearl Ben-Joseph, MD
Date reviewed: January 2014

 
Other Related KidsHealth Articles:
All About Allergies
Up to 50 million Americans, including millions of kids, have an allergy. Find out how allergies are diagnosed and how to keep them under control.
Allergies
Your eyes itch, your nose is running, you're sneezing, and you're covered in hives. The enemy known as allergies has struck again.
Allergy Shots
Many kids battle allergies year-round, and some can't control their symptoms with medications. For them, allergy shots (or allergen immunotherapy) can be beneficial.
Allergy Testing
Doctors use several different types of allergy tests, depending on what a person may be allergic to. Find out what to expect from allergy tests.
Asthma
Millions of teens in the United States have asthma, a lung condition that causes difficulty breathing. Here are the basics on symptoms, triggers, and treatments.
Asthma
Asthma is a condition that affects a person's airways, also known as breathing tubes. Find out more in this article for kids.
Asthma and Teens
The teen years can be rough for kids, and they can be even rougher for teens with asthma. These tips can make parenting a teen with asthma a bit easier.
Asthma Basics
With the right asthma management plan, families can learn to control symptoms and asthma flare-ups more independently, allowing kids to do just about anything they want.
Asthma Center
Asthma keeps more kids home from school than any other chronic illness. Learn how to help your child manage the condition, stay healthy, and stay in school.
Asthma Center
Asthma means breathing problems. Find out what's going on in the lungs and how to stay healthy, if you have it.
Asthma Center
Visit our Asthma Center for information and advice on managing and living with asthma.
Asthma-Safe Homes
You want to feel good in your own home, right? If you have asthma, you can take steps to remove or minimize triggers at home that cause breathing problems and asthma flare-ups.
Do Allergies Cause Asthma?
Some things that cause an allergic reaction, such as pollen or dust, can also trigger asthma symptoms. But not everyone who has allergies develops asthma and not all case of asthma are related to allergies. Find out about the connection here.
Do Allergies Cause Asthma?
Kids who have allergies are more likely to have a breathing problem called asthma. Find out more in this article for kids.
If My Child Has Asthma, Can We Keep Our Pet?
At least 30% of people with asthma are allergic to animals. So if your child has asthma, consider whether your pet could be producing allergens that trigger asthma symptoms.
Learning About Allergies
During an allergic reaction, your body's immune system goes into overdrive. Find out more in this article for kids.
Managing Asthma
Asthma control can take a little time and energy to master, but it's worth the effort. Learn more about ways to manage your child's asthma.
Seasonal Allergies (Hay Fever)
At various times of the year, pollen and mold spores trigger the cold-like symptoms associated with seasonal allergies. Most kids find relief through reduced exposure to allergens or with medications.
Your House: How to Make It Asthma-Safe
If you have asthma, you want to breathe easy at home. Find out how in this article for kids.
 
Related Resources:
Allergy and Asthma Network/Mothers of Asthmatics (AAN-MA)
Through education, advocacy, community outreach, and research, AAN-MA hopes to eliminate suffering and fatalities due to asthma and allergies. AAN-MA offers news, drug recall information, tips, and more for treating allergies and asthma. Call: (800) 878-4403
American Academy of Allergy, Asthma, and Immunology
The American Academy of Allergy, Asthma, and Immunology offers up-to-date information and a find-an-allergist search tool.
American College of Allergy, Asthma, and Immunology
The ACAAI is an organization of allergists-immunologists and health professionals dedicated to quality patient care. Contact them at: American College of Allergy, Asthma, and Immunology 85 W. Algonquin Road Suite 550 Arlington Heights, IL 60005 (800) 842-7777
American Lung Association
The mission of this group is to prevent lung disease and promote lung health. Contact the group at: American Lung Association 61 Broadway, 6th Floor NY, NY 10006 (212) 315-8700
National Institutes of Health's National Institute of Allergy and Infectious Diseases (NIAID)
The National Institute of Allergy and Infectious Diseases (NIAID) conducts and supports basic and applied research to better understand, treat, and ultimately prevent infectious, immunologic, and allergic diseases.