7.Allergies
Common things that can trigger an asthma attack include mold; dust mites; cockroaches; pollen from trees, grass, or flowers; and foods such as peanuts, eggs, and fish.
If pollen is one of your triggers, you’ll probably notice your asthma symptoms are worse around the same time every year.
8.Pets
The problem is dander — dead skin cells from your pet that collect on clothing, furniture, and walls. When you breathe it in, it can trigger an asthma attack in as little as 15 minutes.
People with cat allergies react to a protein in the saliva, skin, and urine. This protein builds up in the air or on surfaces and can trigger asthma attacks in some people with asthma.