Tips for Asthma Prevention

Medically Reviewed by Renee A. Alli, MD on June 01, 2021

If you have asthma, you need to do what you can to cut your exposure to asthma triggers. That starts by knowing what causes you to cough, wheeze and grasp for breath. While there’s no cure, there are steps you can take to keep your asthma in control and prevent an attack.

1. Identify Asthma Triggers

Certain asthma triggers can set off a cascade of asthma symptoms. These include:

It’s vital to learn to identify your asthma triggers and take steps to avoid them.

Keep track of your symptoms in an asthma diary for several weeks. Detail all the environmental and emotional things that affect your asthma. When you have an asthma attack, check the diary to see which thing, or combination of things, might have led to it. Some common asthma triggers, like molds and cockroaches, aren’t always obvious. Ask your asthma specialist about tests to find the allergens you respond to. Then take steps to avoid them.

If you have exercise-induced asthma, are planning a heavy workout, or plan to exercise in cold, humid, or dry air, take steps to prevent an asthma attack. Follow your doctor's advice on asthma treatment (usually by using an asthma inhaler containing the drug albuterol before you exercise).

2. Stay Away From Allergens

If you have allergies and asthma, it’s important to keep your distance from allergens (things you’re allergic to). Allergen exposure can increase the inflammation in your airways for a while, making an attack more likely.

3. Avoid Smoke of Any Type

Smoke and asthma are a bad mix. Limit exposure to all sources of smoke, including tobacco, incense, candles, fires, and fireworks. Don’t allow smoking in your home or car, and avoid public places that permit it. If you smoke cigarettes, get help to quit. Smoking always makes asthma worse.

4. Prevent Colds

Do what you can to stay well. Avoid close contact with people who have a cold or the flu, because catching it will make your asthma symptoms worse. Wash your hands well if you handle items that someone with a respiratory infection may have touched.

5. Allergy-Proof Your Home

Whether you’re at home, work, or traveling, there are things you can do to allergy-proof your environment and lower your chances of an asthma attack. Don’t eat in restaurants that are smoky or allow cigarette smoking. Reserve a smoke-free hotel room. If you can, bring your own bedding and pillows in case the hotel only supplies feather pillows and down comforters. They can house dust mites and cause asthma symptoms.

6. Get Your Vaccinations

Get a flu shot every year to protect against the flu virus, which can worsen your asthma for days or weeks. Asthma makes you more likely to have complications from the flu, like pneumonia, and to be hospitalized because of it. Anyone over 19 should get a pneumonia shot (called Pneumovax) once every 5 to 10 years. You also have a higher chance of getting pneumococcal pneumonia, a common type of bacterial pneumonia. And you need a Tdap vaccine to protect you against tetanus, diphtheria, and whooping cough, along with a zoster vaccine to keep you safe from shingles.

7. Consider Immunotherapy Allergy Shots

If your doctor finds that you have allergies, allergy shots (immunotherapy) may help prevent allergy symptoms and keep your asthma from getting worse. With allergy shots, the doctor injects small doses of allergens under your skin on a regular schedule. Over time, your body may get used to the allergen and respond less when you’re exposed. This can help keep your asthma under control.

8. Take Asthma Medications as Prescribed

Long-term asthma medications are designed to prevent symptoms and attacks. You need to take them every day, even if you don’t have symptoms. They’ll ease inflammation in your airways and keep your asthma under control, so it’s less likely to flare up. If side effects bother you, talk to your doctor about switching to another treatment.

9. Follow Your Asthma Action Plan

Take your meds, even when you feel OK. Keep an inhaler on you. If you notice symptoms, check your plan for instructions on what medications to take. During an attack, the plan can tell you what meds will help and when it’s time to call the doctor.

10. Use a Home Peak Flow Meter

The meter shows how well air is moving through your lungs. During an attack, your airways narrow. The meter can let you know this is happening hours or days before you have any symptoms. This gives you time to take the medications listed in your treatment plan and possibly stop the attack before it starts.

Show Sources


Asthma and Allergy Foundation of America: "Asthma Overview: Prevention," “Peak Flow Meters.”

National Asthma Education and Prevention Program. Expert Panel Report: Guidelines for the Diagnosis and Management of Asthma, 2002.

National Institutes of Health publication number 02-5074, June, 2003.

Brostoff, J. and Gamlin, L., Asthma: The Complete Guide to Integrative Therapies, Healing Arts Press,1999.

Plaut T. and Jones, T., Dr. Tom Plaut's Asthma Guide for People of All Ages, Pedipress Inc., 1999. 

American College of Allergy, Asthma & Immunology: “Asthma Treatment,” “What Is An Asthma Action Plan?”

CDC: “Lung Disease including Asthma and Adult Vaccination.”

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