The most common asthma triggers are tobacco smoke, dust mites, outdoor air pollution, cockroach allergens, pets, mold, and smoke from burning wood or grass.
Dr. Mario Zambrano, Pediatric Emergency Medicine Physician with Homestead Hospital, says about tobacco smoke that there is a third hand smoke that stays on your clothing and hair. "Parents often say 'I smoke outside, I do not expose my child to cigarette smoke', but they smoke and keep on the same clothing around the child or patient, you can still smell it."
