Who Can Develop Asthma?
Asthma seems to be caused by both hereditary (genetic) and environmental factors. While asthma can develop at any age, it tends to most commonly start in children age 2-6 years. At this age, asthma is triggered by allergens such as dust mites, tobacco smoke, and viral upper respiratory infections
Adults can also develop asthma, and only about 30% of the triggers are related to allergies such as to pets, mold, dust, or perfumes. Risk factors for adult-onset asthma include being female, obesity, hormonal fluctuations such as those experienced during or after pregnancy or menopause, and viral or other infections.