Asthma doesn't have a single cause. It's the result of a combination of genetic and environmental factors that influence how a child's airways develop and respond.

Some children are simply born with airways that are more reactive. If asthma, allergies, or eczema run in the family, a child is more likely to develop asthma as well.

Environmental factors also play a significant role. Exposure to secondhand smoke, air pollution, or certain allergens early in life has been linked to a higher likelihood of developing asthma. Respiratory infections during infancy and early childhood can also affect the development of the airways.

It's worth noting that asthma and allergies are closely related. Many children with asthma also have environmental allergies, and allergens are among the most common triggers for asthma symptoms.

An asthma trigger is anything that irritates or inflames the airways and causes symptoms to flare. Triggers vary from child to child, but some of the most common ones include:

• Allergens such as pollen, dust mites, mold, pet dander, and cockroach particles
• Respiratory infections like colds, flu, and other viruses
• Exercise or physical activity, which is why some children cough or wheeze during or after running
• Cold air or sudden changes in weather
• Smoke, including cigarette smoke, wood smoke, and wildfire smoke
• Air pollution and strong odors, like cleaning products, perfumes, or car exhaust
• Stress or strong emotions, which can sometimes trigger symptoms in sensitive children

Identifying your child's specific triggers is one of the most helpful things you can do. Not every child reacts to the same things, so paying attention to patterns, when symptoms occur and what was happening beforehand, can give you valuable information.

Asthma doesn't look the same in every child. Some children wheeze frequently, while others mainly cough. Some have symptoms only during exercise, while others wake up at night struggling to breathe.

Common signs of asthma in children include:

• A persistent cough, especially at night or early morning
• Wheezing, which is a whistling or squeaky sound when breathing
• Shortness of breath or feeling like they can't catch their breath
• Chest tightness or a feeling of pressure in the chest
• Fatigue during activity, because breathing takes more effort
• Coughing or wheezing that gets worse with exercise, cold air, or certain environments

In younger children who can't yet describe how they feel, watch for signs like breathing faster than usual, the skin between their ribs pulling inward when they breathe, or nostrils flaring. These can all be signs that a child is working harder to get air.

Diagnosing asthma in children, especially young ones, can take some time. There's no single test that confirms asthma on its own. Instead, a healthcare provider looks at a combination of factors, including your child's symptoms, how often they occur, what makes them better or worse, and family history.

In older children, a breathing test called spirometry can help measure how well air moves in and out of the lungs. In younger children, diagnosis often relies more heavily on observing symptoms over time.

It's common for parents to spend months wondering whether their child's frequent cough or "recurring colds" might actually be asthma. Tracking when symptoms occur and what seems to trigger them can make a big difference when talking with a healthcare provider.

Managing asthma at home is largely about reducing exposure to triggers and creating a breathing-friendly environment for your child.

Some practical steps include:

• Keep your home as smoke-free as possible. Secondhand smoke is a major asthma trigger
• Use allergen-proof covers on pillows and mattresses to reduce dust mite exposure
• Vacuum and dust frequently, and consider a HEPA air purifier for your child's room
• Keep pets out of the bedroom if dander is a trigger
• Monitor air quality in your area, especially during wildfire season or high pollution days, and limit outdoor time on poor air quality days
• Keep your home at a consistent temperature and humidity level, since extremes can trigger symptoms
• Help your child understand their own triggers and what to do when they feel symptoms starting

It can also help to create a simple written plan so that caregivers, teachers, and coaches know what to do if your child has symptoms at school or during activities.

If you suspect your child has asthma, or if your child has already been diagnosed but symptoms seem to be getting harder to manage, it's a good time to connect with a healthcare provider.

Seek care if:

• Your child coughs frequently, especially at night or with exercise
• You notice wheezing or breathing that sounds different from usual
• Your child says their chest feels tight or they're having trouble breathing
• Symptoms are affecting sleep, school attendance, or their ability to participate in activities
• Your child avoids physical activity because they're afraid of triggering symptoms

If your child is struggling to breathe, their lips or fingernails look bluish, or they're unable to speak in full sentences due to shortness of breath, seek emergency care right away. These are signs of a severe asthma episode.

Myth: Children with asthma shouldn't exercise. Fact: Physical activity is important for all children, including those with asthma. With the right awareness and preparation, most children with asthma can be fully active.

Myth: Asthma is contagious. Fact: Asthma is not an infection and cannot be passed from one child to another.

Myth: Children always outgrow asthma. Fact: Some children do see their symptoms improve as they get older, but many carry asthma into adulthood. It's not safe to assume it will go away on its own.

Myth: If a child isn't wheezing, they're fine. Fact: Some children with asthma never wheeze. Coughing, especially at night or with activity, can be the primary symptom.

Understanding the truth about asthma helps parents make better decisions and feel more confident supporting their child's health.