Cigarette smoke can also cause asthma attacks.
Pollen is the biggest problem outdoors. Remove carpets from your home, and use a damp mop to clean linoleum or wood floors. You may use throw rugs that can be machine washed. Instead of drapes and cloth-covered furniture, use washable curtains or vinyl shades and furniture you can wipe with a damp cloth, especially in your child's bedroom. Wash sheets, blankets and pillows, throw rugs and stuffed animals often, using hot water to kill dust mites.