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Asthma attacks can be stressful for both children and parents. Beyond the immediate symptoms, they can lead to missed school days, emergency room visits, and even hospital stays. What many parents don’t realize is that one asthma attack can increase the risk of future ones — but by knowing the warning signs and tracking your child’s lung health, you can take steps to reduce that risk and prepare for an attack.
Children who have Repeat Asthma Attacks
Research shows that children who have had an asthma attack are more likely to have another one within the next year — about a 25% higher chance (1, 2). Similarly, the more times a child is hospitalized for asthma, the greater the likelihood of another hospital visit down the line (1).
One of the key predictors of future asthma problems is a measure called FEV₁ — or forced expiratory volume in one second. It’s a way to see how much air your child can breathe out quickly after taking a deep breath. (Learn what the spirometry lung function measures mean here)
In one study, researchers found that a 10% drop in FEV₁ over three months increased the risk of another asthma flare-up by 28% in the next three months (1, 3). It also meant poor asthma control was more likely (3).
Other studies have shown that when FEV₁ levels are below 80% of what’s expected for a child’s age and size, the risk of another asthma attack increases significantly (4). This risk is even greater for FEV1 less than 60% of the predicted value (4). In other words, even a single lung function test can help predict asthma risks for months — or even years — ahead (5).
Another helpful measure is the mid-maximal expiratory flow (MMEF), also known as forced expiratory flow25-75% (FEF25 - 75%). This number represents the average airflow during the middle 50% of a spirometry test. It gives doctors more detail about how well the smaller airways are working (6). One study found that a low MMEF was linked to a higher number of asthma attacks in the following year, making it another valuable tool for predicting which children might be at greater risk (7).
What Parents Can Do
1. Monitor Lung Function at Home with SPARKYTM
Keeping track of your child’s lung function can help you spot early signs that asthma may be worsening — before symptoms become serious. SPARKYTM lets you measure important lung function values such as FEV₁ and MMEF at home. This gives you and your child’s doctor valuable information to adjust treatment early and prevent an attack.
2. Watch for Changes in Symptoms
If your child’s coughing, wheezing, or shortness of breath seems to be getting worse, even slightly, it’s worth noting. Small changes can signal that their asthma is becoming less controlled (8). Keep on top of changes by using the ACT and TRACK surveys regularly (See our blogs for more information).
3. Stick to the Asthma Action Plan
Every child with asthma should have a written plan from their healthcare provider. Make sure you know when to give daily medications, when to use a rescue inhaler, when to step up medications and when to seek emergency care (8, 9).
4. Follow Up Regularly
Regular checkups — even when your child feels fine — help doctors track trends in lung function and adjust treatment as needed (8).
The Bottom Line
Asthma attacks don’t have to come as a surprise. By staying aware of your child’s lung function and understanding the risk factors for flare-ups, you can take proactive steps to keep their asthma under control — and help them breathe easier every day.
- Sarikloglou E, Fouzas S, Paraskakis E. Prediction of Asthma Exacerbations in Children. Journal of Personalized Medicine 14: 20, 2024. doi: 10.3390/jpm14010020.
- McIntyre A, Busse WW. Asthma Exacerbations: The Achilles Heel of Asthma Care. Trends Mol Med 28: 1112–1127, 2022. doi: 10.1016/j.molmed.2022.09.001.
- Fielding S, Pijnenburg M, de Jongste JC, Pike KC, Roberts G, Petsky H, Chang AB, Fritsch M, Frischer T, Szefler S, Gergen P, Vermeulen F, Vael R, Turner S. Change in FEV1 and Feno Measurements as Predictors of Future Asthma Outcomes in Children. Chest 155: 331–341, 2019. doi: 10.1016/j.chest.2018.10.009.
- Kitch BT, Paltiel AD, Kuntz KM, Dockery DW, Schouten JP, Weiss ST, Fuhlbrigge AL. A Single Measure of FEV1 Is Associated With Risk of Asthma Attacks in Long-term Follow-up. CHEST 126: 1875–1882, 2004. doi: 10.1378/chest.126.6.1875.
- Fuhlbrigge AL, Kitch BT, Paltiel AD, Kuntz KM, Neumann PJ, Dockery DW, Weiss ST. FEV1 is associated with risk of asthma attacks in a pediatric population. Journal of Allergy and Clinical Immunology 107: 61–67, 2001. doi: 10.1067/mai.2001.111590.
- Lazova S, Priftis S, Petrova G, Naseva E, Velikova T. MMEF25-75 may predict significant BDR and future risk of exacerbations in asthmatic children with normal baseline FEV1. Int J Physiol Pathophysiol Pharmacol 14: 33–47, 2022.
- Chereches-Panta P, Marica I, Sas V, Bouari-Coblișan AP, Man SC. The Role of Spirometry and MMEF in Pediatric Asthma Monitoring and Prediction of Exacerbations. Children 12: 1398, 2025. doi: 10.3390/children12101398.
- Asthma Attacks [Online]. Asthma Canada: [date unknown]. https://asthma.ca/get-help/living-with-asthma/asthma-attacks/ [4 Nov. 2025].
- Asthma attack - Diagnosis and treatment - Mayo Clinic [Online]. [date unknown]. https://www.mayoclinic.org/diseases-conditions/asthma-attack/diagnosis-treatment/drc-20354274 [4 Nov. 2025].
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