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Asthma symptoms are caused by triggers. When you’re around a trigger, your airways tighten. They become more inflamed, swollen, and smaller. This makes it harder to breathe.
Triggers vary from person to person. Common triggers include:
- Pets. Pet dander (tiny bits of skin) and saliva can trigger asthma symptoms. So, if you have a pet with fur or feathers, keep it out of your bedroom.
- Heartburn. If you have heartburn, ask your doctor if treating it could help your asthma symptoms.
- Dust mites. These are bugs so small that you can’t see them. Get rid of dust mites by washing sheets, pillow cases, and comforters in hot water. This may help reduce your symptoms.
- Cigarette smoke is a major trigger of asthma symptoms.
- Airway infections, like colds or the flu, can cause asthma symptoms.
- Exercise brings on asthma symptoms in some people. Warm up for a few minutes before you exercise by stretching or walking. Doing this and taking asthma medicines may help prevent asthma symptoms that occur from exercise.
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